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This work is copyrighted to the author © 2009.  Please
don't remove the author information or make any changes
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One in a Million
by The Ratt in the Hat (address withheld)

***

An English teenager helps his mother by performing the 
ultimate favour in front of her class of female biology 
students. (F/M-teen, 1st, voy, mast)

***

Authors note: I hope I have got the scientific stuff 
correct but just in case I haven't I apologise 
unreservedly for my lack of knowledge of reproductive 
science and human anatomy. Who cares though, it's still 
sexy ;)

***

My first sexual encounter was, how can I put it? Rather 
unusual. It all started on a wintry Monday evening...

My mother worked as a senior biology teacher at a 
girls' private school nestled deep in the Devon 
countryside. The school was founded by a rather 
eccentric baroness on the principle that girls should 
be educated in as practical a manner as possible. 

English lessons often involved role-playing, maths 
lessons often involved group problem-solving exercises, 
trades like woodwork and metalwork were taught and 
science of course, included all manner of experiments.

Mum and I lived in a small cottage in the nearby 
village, my dad died when I was only a year old and I 
was an only child, my mum never remarried. We had a 
very close relationship, after all I was all that was 
left of the man she had loved. 

She had a very relaxed attitude towards nudity in the 
home and it was commonplace for either one of us to be 
naked about the house when I was a child. We had been 
to many naturist clubs and beaches when I was young and 
being naked in front of other people held little fear 
for me as it was something I had grown up with. 

But when puberty came, we stopped visiting such places, 
mum respected my right to decide whether or not I 
wished to be seen naked, and I had grown much more 
self-conscious about my body. By the time I was 17, I 
hadn't been naked outside the confines of our bathroom 
for 5 years.

Being a biology teacher, mum had a very detached, 
almost clinical but still very open attitude towards 
sex. There had been several boyfriends since dad died 
and mum was very open about her sexual relationships 
with them. I remember hearing them at it while I was in 
bed at night, it didn't bother me though, I was just 
glad for her that she had a sex life she enjoyed.

By the time I was in my late teens, the boyfriends had 
stopped coming, and my mum, now in her fifties, 
dedicated herself to her work.

As part of the schools' sex education syllabus, it was 
customary, in line with the schools' practical policy 
of education, to employ a live male and female model to 
demonstrate various aspects of sexual activity. 
Unfortunately, that particular year the male model they 
had hired was forced to cancel at short notice due to a 
bout of flu. This is where it all started.

Mum entered my bedroom looking upset.

"What's the matter Mum?" I asked.

"I need to ask you a huge favour" she said a little 
tearfully, "I wouldn't dream of asking you normally, 
but on this occasion I'm desperate."

"What is it that you want?" I replied.

She sighed and I saw a tear trickle down her left 
cheek, this was obviously hard for her. Eventually she 
composed herself and was able to continue.

"I need you to model for me."

Now, at this point I knew what she was referring to. I 
knew about the school using male models but I didn't 
know about the specific things that they did. I assumed 
at the time that all that I would be required to do 
would be to stand in front of a class of girls – naked. 
I didn't like the idea.

"The male model we booked is unable to make it" Mum 
continued, "he has flu and I need a replacement before 
Wednesday, it's too short notice to arrange for another 
– we had enough trouble trying to convince the last 
one."

"Well, I don't know, the idea of standing around in the 
nude in front of a load of girls doesn't really appeal 
to me," I said.

Mum began to weep a little.

"Please," she begged. "I'm desperate, I'm only asking 
you to do this for me because I have no alternative."

As much as I disliked the idea, I didn't like to see 
mum upset, it wasn't as though I had never been seen 
naked by a group of girls before, although they were 
also naked at the time. I wasn't to be alone either, 
mum explained that there was also a female model and 
that she was an ex-pupil of the school.

I decided that I wanted something in return for the 
favour.

"Well..." I said, "I would consider it if you did 
something for me."

"Name it, anything," Mum said.

"Well, you know how I said that I wanted to get a 
motorbike," I said.

"Yes, anything as long as you'll do this for me."

I thought about the proposition for a moment, I weighed 
up the pros and cons and came to a decision.

"Ok, deal," I said.

Mum burst into a flurry of tears and hugged me tightly.

"Thank you, thank you, I promise to be gentle," she 
said, which started to ring alarm bells in my head, 
what had I just let myself in for? Well, there was no 
going back on my word, I would never dream of letting 
Mum down, and I really desperately wanted that 
motorbike.

Wednesday came, the morning was crisp and there was a 
hard frost on the ground. Mum and I walked together to 
the school.

"I'm so proud of you for doing this for us," she said.

I just nodded, a sense of fear had taken hold of me, 
but there was no way out, I had to resign myself to 
whatever was going to happen to me.

However what actually happened that day was beyond my 
wildest imaginings.

My 'performance' was due to take place at 10 o'clock 
that morning and I would be on my own at first, the 
female model wasn't due to come into play until the 
next day, mum had promised that I could watch, another 
condition of my agreeing to going through whatever was 
going to happen today.

Mum ushered me into a classroom, empty except for a 
table with a couple of pillows on it and some stools, 
the curtains were all closed and the connecting door to 
the adjacent classroom, where the girls were waiting, 
was securely locked.

"What do I have to do?" I asked Mum nervously.

"Just strip off down to your underwear and put this 
on," she said as she handed me a dressing gown.

She hugged me again.

"Thank you for doing this, remember I love you more 
than anything," she said and she kissed me on my left 
cheek. "I'll give you five minutes and then I'll show 
them in."

She unlocked the door to the classroom next door and 
went in, locking it again behind her. I could hear 
excited girly chatter and laughter coming from next 
door – I was silently terrified.

I had to keep reminding myself of that promised 
motorbike to keep myself going as nervously, I began to 
undress.

Five minutes passed and I heard the sound of the door 
being unlocked. Mum entered the room accompanied by 8 
young girls, all around the age of 13, I had expected 
there to be an entire class in here.

"Ok girls," Mum said, addressing her pupils. "You're 
privileged to be the first group and I want all of you 
to show some respect to our model here who has kindly 
agreed to allow us to examine him."

I just stood there, dumfounded. This was just the first 
group, whatever was going to happen to me, it would 
only be the first of three, four, maybe more times that 
day. 

Think of the motorbike.

I summoned up some inner strength from somewhere and 
managed to compose myself.

The girls sat down on the stools opposite the table, 
their gaze aimed squarely at my crotch.

"Now, if I could ask for our model to remove his 
dressing gown please," Mum said.

Nervously, I took off the dressing gown and handed it 
to her. I stood there with only my yellow cotton 
underpants protecting my decency, I regretted wearing 
that colour instantly, wishing I had chosen boxer 
shorts instead. The girls sat there, mouths gaping as 
they stared at the bulge of my maleness in the front of 
my pants.

"Now then," Mum said, clearing her throat. "We see 
before us a specimen of a young adult male, 17 years of 
age, and as you can see he is post pubescent – what 
does that mean Karen?"

"That he is fully sexually developed Miss," Karen said.

"Correct," Mum said. "Now, in a moment I will remove 
his underwear so that we can examine his genitals, but 
first I want you to sketch him on your worksheets."

Then I heard, "I will remove his underwear?" Oh my god, 
I thought to myself, Mum's going to pull my pants down!

The girls sketched away on their worksheets for what 
must have been five minutes, I just stood there, 
silently awaiting my fate.

"Right then girls," Mum said as the girls put their 
pencils down on their clipboards, "I'm now going to 
remove his underwear."

Mum turned me around so that I was standing in front of 
her, she knelt down on the floor and placed her hands 
at the waistband of my pants, she looked up at me, and 
I could see her love for me and her gratitude in her 
eyes.

"Thank you," she said silently and she pulled my pants 
down to the floor in one swift movement to the sound of 
gasps and giggling from the assembled girls. 

I felt a massive wave of shame and embarrassment as I 
stepped out of my pants, Mum tossing them onto the 
floor next to my dressing gown. My face flushed bright 
red and my heart pounded in my chest. Mum simply let 
the show go on.

"Right girls," she said, "as you can see our male is 
now naked – stop smirking Natalie! Now, you can clearly 
see his external reproductive organs, can any of you 
tell me what they are called?"

All of the girls put their hands up, whilst still 
fighting back the giggles, oh God this was so 
embarrassing!

"Yes Sara," Mum said.

"His penis and his testicles Miss!" said Sara.

"That's right Sara, his testicles are where he produces 
his sperm but we can't actually see his testicles 
themselves because they are contained inside a sort of 
'bag' of skin – does anyone know what that is called?" 
Mum said.

Only two of the girls put their hands up this time.

"Yes Davina," Mum said.

"Is it called his scrota Miss?" asked Davina.

"Almost, it's actually called his scrotum and it is 
quite a clever piece of skin," Mum explained. "It can 
expand and contract which allows his testicles to come 
closer into the body or dangle lower away from the 
body, does anyone know why that is?"

None of the girls put their hands up this time so Mum 
went on to explain. "Well, in order to produce sperm 
cells, his testicles need to be slightly below the 
temperature of the rest of his body, so his scrotum 
pulls his testicles into his body when it is cold and 
lowers them away from his body when it is warm."

At the same time mum held up two pictures – of my 
genitals – which had been taken the day before, one 
shortly after getting out of a warm bath and the other 
after having them showered with cold water for a few 
minutes.

"Right, if you could all sketch his genitals onto your 
work sheets and after that we'll continue" Mum said, 
the girls busied themselves away, some of them 
whispered into each other's ears, giggling and 
blushing.

After a few more minutes of sketching mum broke the 
silence.

"Now then, can anyone tell me what his penis is 
actually for?" Mum asked.

All the girls put their hands up once more, Mum pointed 
to the youngest looking girl at the extreme left of the 
group.

"Yes Janey," she said.

"Miss, is it for having sex with?" Janey said.

"That's right Janey, but it actually has two uses. You 
see, in addition to being the organ which the male uses 
to impregnate the female, it is also used for 
urination," Mum explained.

"What, you mean he pees through it as well? Urgh!" 
exclaimed Sara.

All of the girls burst into a fit of giggling at this 
and Mum had to quieten them down before she could 
continue, my embarrassment was really beginning to get 
to me by now, I just stood there trembling slightly, at 
least I wasn't having an erection - that would be the 
ultimate embarrassment.

"Now, now girls – settle down, show some respect 
please," Mum said, "now then, what we'll do now is have 
a closer look at his genitals and see if we can get him 
to have an erection for us."

Massive alarm bells began to ring in my head now, just 
how far was this going to go?

Mum ushered me onto the table and whispered into my 
ear.

"Don't be frightened, you're doing fine, it'll be all 
over soon – I'm so very proud of you."

I laid back onto the cold, hard surface of the table 
and rested my head on the pillows, I thought to myself 
that this was a million times worse than I had expected 
and I was on the verge of telling Mum to forget it, but 
I didn't want to let her down and after all, she did 
promise to get me a motorbike if I went through with 
it.

Think of the motorbike.

"Now, lets have a closer look, gather around girls," 
Mum said.

All of the girls moved their stools closer to the 
table, so close that I could almost feel their breath 
on my vulnerable, naked body.

"Now, his penis is made of a spongy material which 
fills up with blood when he is sexually aroused, a sort 
of 'valve' prevents that blood from escaping which 
causes his penis to become hard and stiffen, it's a bit 
like blowing up a balloon."

It was clear to me that only my fear was preventing me 
from erecting.

"The tip of his penis is called his glans and it is a 
very sensitive part of his body and at the very tip of 
it is a tiny slit called the meatus which his where his 
urine and his semen comes out," Mum said as she pointed 
to my penis – luckily the girls were staring at it so 
that they were unaware of the look of fear on my face. 
Mum continued with her lecture.

"Now, we can't actually see his glans and his meatus at 
the moment because they are covered by his foreskin, 
his foreskin is a fold of skin which helps protect the 
glans, keeping it smooth and soft. Some boys, such as 
Jewish boys and many Muslim and African boys as well as 
a lot of boys in America, are circumcised – does anyone 
know what that means?"

Karen was the only girl to put her hand up this time.

"Is it when they cut it off?" she said "Urrgghhhh!!!" 
said the other girls in unison.

"It's a little more complicated than that Karen," Mum 
said. "But yes, it is where the foreskin is either 
partially or fully removed to permanently expose the 
glans and the meatus. In Muslim and Jewish boys it is 
performed soon after they are born, this is also true 
for many American boys. For many African boys and also 
from tribal peoples around the world it is performed 
later in life as a way to mark the transition from 
boyhood to manhood."

"Isn't it painful for them miss?" asked Sara.

"Well, yes it is of course and when it is performed on 
babies it is rare for any anaesthetic to be used and 
they have to be tied down during the procedure. in some 
cultures when circumcision is performed in late 
childhood it is seen as a matter of honour for the boy 
not to flinch or show any emotion as he is being cut."

"Poor things, at least girls don't have to go through 
that sort of thing," said Janey.

"Well as a matter of fact," mum said, "many girls in 
some parts of Africa and other parts of the world are 
forced to endure female circumcision which is a much 
more horrific procedure which fortunately, has been 
made illegal in many parts of the world."

"But enough about that," Mum continued, "let's retract 
his foreskin so that we can see his glans."

Mum reached down between my legs and made contact with 
my penis for the first time, she carefully took hold of 
it and started to retract my foreskin as the girls 
looked on.

"There, gather around so that you can see it," said 
Mum, still with my penis in her hand, I could feel the 
first stirrings of my imminent erection. The girls did 
as instructed and had themselves a good, long look at 
my exposed glans. Mum could obviously feel my penis 
coming to life in her hand.

"Now, as you can see, he is starting to have an 
erection, in a few minutes he will be fully erect, can 
anyone tell me why the penis becomes erect?"

None of the girls volunteered an answer, for the first 
time I could see them blushing out of sympathy for me 
as they looked on in wonderment.

"Well," Mum continued, "The reason his penis needs to 
be erect is so that it can be inserted into the 
female's vagina and allow him to have sexual 
intercourse with her. He also needs to be erect in 
order for him to masturbate himself – we'll cover the 
subject of masturbation later on in the course."

I looked down and could see that I was now fully erect, 
my naked glans fully exposed and pointing to the 
ceiling. The girls just stood there, their mouths agape 
at the sight laid out before them.

"Urrrggghhhh!!! look!" exclaimed Sara, "He's staring to 
pee!."

"That's not urine Sara," Mum said, "It's actually 
called pre-ejaculate fluid often called 'precum', it is 
produced by males and females when they are sexually 
aroused and acts as a natural lubricant to make sexual 
intercourse more comfortable."

By now, my precum was almost gushing from my penis, 
glistening in the light. It made contact with my 
testicles in a long, thin, sticky trickle.

Then came the moment that changed everything.

"Right then girls, I'm now going to stimulate his penis 
until he ejaculates, now, if any of you don't want to 
see this, now's the time to leave the room," Mum said.

I simply could not believe what I was hearing, my own 
mother was about to masturbate me, this on its own was 
bad enough but that was multiplied by a hundred times 
because of the young girls watching it happen. I wanted 
to wake up from this bad dream but unfortunately for me 
it was no nightmare, it was really happening and was 
going to happen right there and then. Mum was about to 
give me my very first handjob.

I had no option other than to let it happen and hoped 
that it wouldn't take very long.

As expected, none of the girls took their leave, their 
gaze firmly fixed on my soon-to-be masturbated penis.

"Ok then, here goes, I'm going to take hold of his 
penis with my right hand and stimulate it by stoking it 
up and down its shaft allowing his foreskin to retract 
repeatedly against his glans. This will have the effect 
of stimulating the sensitive nerve endings in his glans 
causing a reflex action which will cause sperm cells to 
be released from his testicles. 

"These sperm cells will then travel down his sperm 
ducts into his Cowper's gland which will then mix his 
sperm with seminal fluid which makes up his semen. 

"That semen will then collect in his prostate gland 
before his climax when it will be released by the 
prostate and quickly travel down through his urethra 
running through penis before being squirted from his 
meatus at quite a high velocity. This is called 
ejaculation and it will be a bit messy so you have been 
warned those of you who may be a little squeamish." 

This was typical of Mum's attitude to sex, cold, 
analytical and scientific. There was no going back now, 
I was moments away from being masturbated – by my own 
mother.

I felt her hand take hold of my throbbing erection, and 
she started to slowly stroke me up and down my shaft. 
With a tear in my eye I watched on as I was masturbated 
before this group of young girls, many of whom had 
never even seen a real penis before, let alone seen one 
fully erect, let alone seen one being masturbated.

I looked at my mother as she worked her hand along my 
shaft, picking up a bit of speed now, she looked back 
at me and I could see her love for me in her eyes as 
she masturbated her only son. I could sense her 
gratitude, never again would our relationship ever be 
the same.

With her left hand she stroked my hair, mouthing the 
words, "thank you" and "you're doing so well," and, 
"I'm so very proud of you."

It felt like there was a nuclear bomb going off between 
my legs, mum had obviously done this many times before, 
she knew exactly how to give the most pleasure 
possible.

The girls watched on in stunned silence. I looked into 
their eyes, I could tell that some of them were 
becoming more than a little aroused at the sight of me 
being masturbated before their very eyes. I visualised 
the little wet patches starting to develop in their 
panties.

"Right girls," Mum said after a couple of minutes and 
virtually stopped her stroking. "I want you to take it 
in turns to touch his scrotum and feel for his 
testicles, they should have retracted into his body 
slightly, this is a sign that his testicles are 
emptying into his sperm ducts. Ok, Sara first please."

Sara stepped up and stood next to Mum, she moved her 
right hand down between my legs and hesitantly made 
contact with my testicles. By now I was past caring, I 
was actually starting to enjoy myself. The feeling of 
the young girl touching my testicles was simply 
fantastic.

When she had finished, the next girl had a feel, mum 
was masturbating me very slowly in such a way that was 
enough to keep me erect and stimulated but not enough 
to make me cum.

When all eight girls had had their turn Mum stepped up 
a few gears, masturbating me harder and faster. I could 
feel my semen start to rise and I knew that my climax 
was imminent. Mum seemed to sense this too.

"Right girls, he is just about ready to ejaculate, you 
might want to stand back a little."

The girls did as they were told and moments later I 
felt myself ready to ejaculate. Every single muscle and 
fibre in my body tingled with pleasure, I gripped onto 
the sides of the table and gritted my teeth, I wanted 
to delay it as much as possible but it was no use.

I was going to cum and I was going to cum hard.

Suddenly a final wave of pleasure washed over my body 
and a mass of sticky, greyish-white semen shot out of 
my penis and landed on my belly.

"Urrrggghhhh!" the girls said in unison.

Blast after blast of my sperm erupted from my cock and 
landed on my tummy, a small pool of it ending up in my 
belly button.

Just then I felt the knuckle of my Mum's left index 
finger press hard against my perineum, the acupressure 
point located between my testicles and my anus. This 
made me cum even harder.

"Good boy, there's a good boy," mum said, addressing me 
as if I was a dog or something as she milked the last 
gush of semen from my penis.

But then all good things come to an end. I was totally 
spent, and Mum finally released my penis from her grip 
and let it flop against my semen covered belly.

"Well girls, there you have it," Mum said as she took a 
small pipette and sucked up some of my semen off my 
belly and placed it onto a small glass slide. "Pure 
human semen. Now, what I want you to do in a minute is 
go next door and look at it under the microscope and 
sketch on your worksheets what you see. But first I 
think our volunteer deserves our thanks."

"Thank you sir," the girls said in unison. And that was 
that, they left the room leaving me alone with my 
mother.

"I can't begin to thank you for going through with 
that," Mum said with a tear in her eye as she mopped up 
my semen with a tissue. 

"I'm so sorry I had to do that to you but you were 
magnificent, I've never seen my son's semen before, 
it's funny, I didn't think it would affect me in such a 
way as this," she said as she dabbed a tear from her 
eye with her left hand. I sat up and we hugged, still 
naked, my penis flaccid once more with the last of my 
semen dribbling from it.

"Here, let me clean off your penis," she said as she 
reached for another tissue.

"Why didn't you tell me you were going to masturbate 
me?" I finally asked as she dabbed around my foreskin.

"I'm sorry, I, I thought you knew," she said, "I'm sure 
I told you what we do with our male volunteers in the 
past."

She probably had but at the time I didn't remember her 
telling me. Besides it was too late now, what was done 
was done, I had been masturbated by my mother but I had 
enjoyed it.

But then she dropped another bombshell.

"Come on," she said, "put your pants back on – there's 
another five groups to get through today, I want you 
ready to go again in half an hour."

So that was what happened, In total, Mum masturbated me 
six times that day, each time was wonderful and scary 
and embarrassing at the same time, but I'll never 
forget that first time as long as I live.

But it was not over yet.

Mum was true to her word, and the next day she let me 
watch (discreetly, from behind a curtain a few feet 
away) as the class 'examined' the female model, her 
name was Claire, she was 35 years old, blonde with 
brown eyes.

She was stood in a pink dressing gown next to the table 
just as I had done the previous day and just after the 
first group of girls entered, Mum instructed her to 
remove it. She stood there wearing nothing but a pair 
of lacy white panties, she didn't wear a bra, and her 
lovely, shapely breasts, crowned with large erect 
nipples had me wishing I could be closer to the action.

It was a beautiful sight to behold. A few minutes 
later, Mum pulled Claire's knickers down just as she 
had pulled my pants down the day before. She had shaved 
her genitals which gladdened my soul enormously. I 
didn't like pubic hair, I found it to be a real turn-
off. 

Whenever I went online to find pictures to masturbate 
with I always preferred pictures of those who had 
shaved down there, it just looked so much nicer that 
way. I also regularly shaved my own pubic hair off.

Anyway, the group of eight girls (the same group of 
eight that saw me make my first 'performance' the day 
before) examined Claire's genitals. She had obviously 
been through it all before as she seemed totally 
relaxed. I wish that I could say the same about myself, 
for I was having a massive erection just watching it 
all. Mum spread open her vaginal lips, and took out a 
strange looking device and held it up for the girls to 
see.

"This device, girls, is called a speculum, now what I'm 
going to do is insert it into the vagina and when I 
turn this little wheel here it will spread open her 
vagina so that we can get a good view of her cervix and 
the entrance to the uterus."

Despite only being able to see all this from the side 
it was mesmerising and I was nursing a massive 
erection, precum was oozing from my penis constantly 
and smeared itself all over the inside of my pants. It 
was no use, I simply had to relieve myself, I unzipped 
my flies, pulled my jeans down quickly followed by my 
pants. I took hold of my massively erect cock and 
started to wank myself off furiously.

Mum, totally unaware of what was going on behind the 
curtain, continued with the examination of Claires' 
ganitalia and the girls sat on their stools sketching 
away on their worksheets once more.

After a while the examination ended and Claire sat up, 
got off the table and put her knickers back on. It was 
soon after this that Mum announced to the girls about 
what was to happen tomorrow.

"Now then girls, we have examined a male's genitals and 
taken a look at his semen and we have examined a 
females' genitals and looked inside the vagina and into 
the womb. Tomorrow we will be looking into the 
mechanics of sex and our two models will demonstrate 
the act of sexual intercourse for us."

I could not believe what I had just heard, I froze, on 
my knees, my mouth agape with my jeans and pants around 
my ankles. I would be having sex with her tomorrow! But 
the realisation that I would be losing my virginity in 
front of an all-female audience which included my own 
mother soon wiped the smile from my face.

The next day, once again I found myself in the 
classroom wearing nothing but a dressing gown and 
underpants. Only this time I was accompanied by Claire, 
also in a similar state of attire. The table in the 
middle of the room was bigger this time in order to 
accommodate two people. Once again my Mum ushered in 
the same eight girls who were the first group from the 
previous two days.

"Now then girls settle down," Mum said as she made her 
way to the other side of the table. "As I mentioned 
yesterday we have both our male and female models today 
because together they are going to demonstrate the act 
of sexual intercourse, now, can any of you tell me what 
happens during sexual intercourse?"

Sara put up her hand along with Natalie and Janey.

"Yes Jane,y" said Mum, pointing at the young girl.

"The man puts his penis into the woman's vagina and he 
squirts his semen into her womb," said Janey.

"In short, yes," said Mum, "but it's a little more 
complicated than that. You see, once the male has 
inserted his penis he has to use his pelvic muscles to 
stimulate his penis by thrusting it in and out of the 
females' vagina, rubbing up and down the vaginal walls. 

"This has the same effect as when I masturbated him the 
other day. The female, meanwhile is stimulated by 
having the males' penis thrusting in and out of her 
which causes her vaginal muscles to contract, 
eventually this causes the male to ejaculate. Her 
cervix then sucks up the semen into her womb where it 
travels into her fallopian tubes and hopefully 
fertilises her ovum to create an embryo."

I could not believe it was happening to me, I was about 
to lose my virginity to an older woman in front of a 
group of teenage girls only a couple of years younger 
than me and to cap it all, it was happening in front of 
my own mother. I wanted to get it over and done with as 
quickly as possible.

"Now, if our two models could strip off for us we can 
begin," Mum said.

Claire was first to get naked, as was planned and she 
laid down on her back on the table and spread her legs 
open. The sight that greeted me was like nothing I had 
ever seen before. The day before, I only saw Claire 
from the side on so I didn't get to see her genitals in 
all their glory. Her clitoris glistened teasingly and 
her inner labia beckoned me to penetrate her vagina. 

All I knew at the time was that I had to aim for the 
middle of the three openings and I was nervous that I 
would end up inserting into her anus, which would have 
been nice, but it wasn't the planned objective. Mum 
helped by gently fingering Claire's vagina open for me 
to see inside. I was massively erect by then.

My turn to get naked came, I slipped off my dressing 
gown to reveal my pants (white, this time), tented 
because of my erection.

"Ah, as we can see, our male is already erect. So I 
shall now demonstrate how to put on a condom," Mum 
said.

She took out a small foil package from her lab coat 
pocket and pulled down my pants once again.

"Right, pay attention girls because this is a very 
important thing to learn as you will be tested on this 
later."

Mum tore open the package and removed its contents.

"Now this, is a condom, also known as a prophylactic 
sheath, it is a male contraceptive device which acts as 
a barrier preventing his sperm from reaching the womb. 
A condom can only be put on an erect penis. To put it 
on, first you need to take it in your thumb and 
forefinger, holding it at the teated end. Then, you 
place it over the glans of the penis, remembering of 
course to retract his foreskin if he is uncircumcised 
like our male here."

Mum retracted my foreskin, a little too quickly for my 
liking as it hurt a little to be retracted that fast.

"It should look like his penis is wearing a hat" Mum 
said as she showed the girls.

"Then, while still holding the teated end, start to 
roll the rest of the condom over the shaft of the 
penis, remembering to squeeze out all the excess air 
from it.

Mum rolled it down my penis until it came into contact 
with my testicles.

"Now, with the condom on, he is ready to have sex."

Right then, this was it, I was as ready as I ever would 
be, my heart was beating fast and I had butterflies in 
my stomach.

"Now, the act of inserting the penis into the vagina is 
called 'mounting', so if I could ask our male to 
'mount' our female" Mum said.

Nervously, I got up onto the table beside Claire as the 
girls moved in closer to get a better look. I then 
manoeuvred myself between her legs and took a deep 
breath. Mum took hold of my penis for me and guided it 
to the entrance of Claire's vagina.

"Ok then, look closely as he mounts her and watch as 
his penis spreads open her vaginal lips" Mum said and 
slapped me lightly across my bare buttocks, this was my 
signal. I gently moved forward and slowly inserted my 
penis into Claire's body, it felt warm and soft and 
welcoming, the feeling was indescribable, all that I 
can remember of that moment was the rush of pure 
pleasure as my penis was put to its intended use for 
the very first time. Even with the encumbrance of the 
thin latex sheath enveloping my manhood it still felt 
sensationally good. 

Then, suddenly I felt my penis make contact with 
Claire's cervix, I was now fully inserted into her. I 
rested like that for a few moments, getting used to the 
feel of her cervix pressing against the tip of my 
penis. I started to slowly thrust myself in and out of 
her, the watching girls silently in awe of the 
spectacle before them. Claire started to moan and pant 
slightly as I picked up a little speed. I was really 
starting to get the hang of it, my natural animal 
instinct taking over, as if I was in some kind of 
natural autopilot.

I couldn't believe it, I was actually having sex, with 
an older woman. The situation may have been unusual, 
with a group of teenaged girls and my own mother 
watching on but this only proved to be even more of a 
turn-on. In my mind I was the alpha male and I was 
mating with this submissive female in order to fill her 
with my seed.

I gradually started to hump Claire faster and faster, 
her moans and groans became more intense and I could 
tell she was enjoying our first fuck together.

Suddenly, mum spoke to the girls, "If you each take it 
in turn to feel his testicles you may feel them 
retracting into his body just like when we masturbated 
him the other day, Sara, you go first."

Gingerly, Sara reached a hand down between my legs and 
I felt her make contact with my testes, it felt like an 
electric shock of pleasure. One by one, all the girls 
felt me down there, they also rested their hands on my 
buttocks in order to feel my pelvic thrusts and touched 
both Claire's nipples and my own to feel how erect they 
were becoming.

Then, when they were done, I picked up the pace once 
more. I drove myself hard into Claire, grinding my hips 
into her body and gradually I could feel my climax 
starting to build. Somehow, mum sensed this and said,

"Ok girls, I think he is approaching his climax soon, 
any moment now he will ejaculate his sperm into the 
female's body."

It was hard work and I felt a bead of sweat trickling 
down between my buttocks, Claire was panting and 
moaning loudly, her eyes tightly shut, her face 
grimaced as she began to have her orgasm. I felt the 
muscles of her vagina twitch and grip hold of my penis, 
it felt very similar to when mum had masturbated me. I 
desperately held on, determined not to cum too soon, to 
enjoy the sensation of Claire's vagina desperately 
gripping my penis in order to relieve my testicles of 
their precious cargo.

As much as I tried though, I could not delay the 
inevitable and I had to let myself go, and I felt 
myself begin to climax.

I ejaculated into the condom hard, spurt after spurt 
erupted from my body, coating my penis, my first ever 
ejaculation into a human being felt every bit as good 
as I had expected it. My whole body tingled with the 
immense rush of pleasure and I felt the full force of a 
powerful male orgasm, I had no idea I could cum that 
hard. But all too soon it was all over. Our bodies came 
to rest and Claire took my whole weight as I lay on top 
of her, my penis still buried deep within her body.

After catching my breath for a few moments, I got 
myself up and withdrew my penis from Claire's vagina 
and rolled over onto my back on the other side of the 
table. Mum removed the condom from my penis and showed 
it to the girls.

"Et viola, as we can see the condom is now full of his 
semen, now, had he not been wearing it, this semen 
would be inside the female's uterus, the sperm cells it 
contains would make their way into her fallopian tubes 
and fertilise her egg, if there is one there of 
course."

A few moments later, after the girls had thanked Claire 
and myself for our demonstration, mum ushered them out 
of the room leaving Claire and myself alone for the 
first time.

"Thank you," she said, "you were really good."

"Really?" I asked. "I thought I was hurting you."

"No, not at all. Quite the opposite in fact. Am I right 
in believing that that was your first time?"

"Yes," I replied sheepishly.

"And you went through all that to help your mum, you're 
one in a million you know that."

Claire hugged me, and we kissed but we both knew that 
soon we would have to go through the whole performance 
again for the next group. We put our underwear and our 
dressing gowns back on and just sat and talked until it 
was time to go again.

And that was that, my virginity lost, with a group of 
teenage girls and my own mother looking on. In the end 
she was good to her word and several days later mum 
bought me that motorcycle. I had given her my body and 
bared my whole self so that she could educate her 
pupils about the wondrous workings of sexual function. 

The whole experience brought us much closer together, 
masturbation became a normal part of daily life, 
something to be enjoyed and not hidden and I could 
masturbate openly around the house without fear of 
getting caught. I also returned to naturism, as did my 
mother and we both regularly frequent our local 
naturist beach together.

Ten years on, I'm still an avid biker and although I 
have since moved away from home, my mother still works 
at the school and every year I go through the ritual of 
being masturbated by my mum in front of her pupils and 
I wouldn't change it for the world as every time she 
takes my penis in her hand and starts to masturbate me 
I still see that look of motherly love in her eyes. 

The End

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This story was written as an adult fantasy. The author
does not condone the described behavior in real life.

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Kristen's collection - Directory 62