Note: This story was dynamically reformatted for online reading convenience.
 
 ASSTR;'Self Service'{Bunyip}(M/F,mast)[1!1] Self Service by Bunyip

   My wife was playing around with me one night.  We had had sex in the
morning and then again that afternoon so I was slow to respond as she
played with my flaccid cock while I was reading in bed.  As I lay with my
legs apart and knees up, she stretched my cock out and pulled it's head
down past my anus, at which time she stated that I could actually fuck
myself.  I lifted my head from the pillow, glanced around my spy novel, and
said something like "What the!" She repeated the comment explaining that my
cock was long enough to go up my own arse.  "That's nice dear!" I laughed
at her comment.  "Well I'm going to prove it to you!" she answered with
some determination.  So she pulled it again, stretching it, and after
spitting on her fingers she wet my anus.  I have to say it felt very nice
to have her slippery fingers dance over my aroused sphincter.  My legs
parted even more and my head lifted until I had to support myself on my
elbows.  She pulled my testes aside, either side that is, really so that my
shaft passed down between them.  With no effort at all she popped my cock
head into my anus, and pushed it deeper with her finger.  I was starting to
harden and I expected it to pop right out again, but she held it in place
as my shaft stiffened and straightened, and I felt it actually pushing a
little deeper.  Eventually it couldn't come out as it was too stiff and I
felt it stretching my anus and pushing deeper inside me.  For a few moments
I was amazed, and then became a little anxious as I entertained the idea
that it would remain hard and never come out!  She was ecstatic with her
achievement and began to lick my cock, along the upper side, from my anus
to the base of my cock.  She pushed my legs up and my cock slipped out a
little before plunging back even deeper inside my arse, but by now it was
as far up me as it was going to get.  I was fully hard and she had pushed
it in to straighten it out.  It felt quite good except that the tendon at
the top was stretching to despair.  Still her licking was accomplishing the
purpose, both on my cock and around my anus.  I was silent in disbelief as
she used the palm of her hand to massage my cock, pushing with every stroke
to cause me to "fuck myself" as she had intended.  I felt the tightness and
heat of my anus on my cock and I was starting to respond.  With my legs
pushed even further up and back, I lay back on the pillow, relaxing as much
as possible, and enjoyed it more as I accepted the strange sensations. 
Soon she had settled into a rythm with her elbows in my knee pits, one hand
on my belly, the other pushing my cock into my own arse, and her tongue all
over my anus, I gave a shudder and to me greatest surprise, I come inside
myself.  I pushed my legs straight and arched my back as my cock pulsed and
pulsed in an attempt to spurt hot come up inside my hot arse.  I doubt that
it did as being bent over in such a manner, the path was most likely
pinched off.  It wasn't until I had softened somewhat that Glenda could
pull my cock out and suck on it.  She gobbled my limp cock right back into
her mouth and sucked on it till she almost swollowed the head of it into
the back of her throat.  Me!  I was so amazed at it all that I simply lay
back enjoying my adventurous woman.