"Hello, sir. How may I serve you?"
      Don looked up and caught his breath. The salesgirl was maybe twenty-one years old, with perfect skin and big blue eyes that were as wide as a child's. But standing with her hands behind her back made it very clear she was fully mature. The posture pushed her breasts out, though they didn't need it at all, since they stood proudly upright under her dress. Her nipples hardened under the cloth and Don realized she was definitely not wearing a bra. A moment later, he looked up quickly when she smiled and felt his face get hot. He'd been staring, but she was only watching him with raised eyebrows and a look of amusement.
      "Uh, yeah," Don said, swallowing and trying not to look down at those perfect breasts again. "I need something for my niece, but I don't buy a lot of women's clothing."
      "What did you have in mind?" When she looked around the racks of clothing, as if reminding herself what the store had on hand, Don stole another glance at her chest, noticing that her name was Candy and that her nipples were still on full alert. "We've got a few summer things left, but the winter designs don't come for another month."
       Oddly, despite its revealingly clingy blue fabric, her dress was tailored in a very prim fashion, with the collar all the way to her throat. Since the cloth hugged her body tightly, though, it hid nothing of her perfect shape. Don wondered vaguely if she'd chosen a size too small, then forgot everything but the shifting of her breasts and hips under the cloth as her body twisted so she could gaze at the inventory behind her. Then, he felt a pang of discomfort. The mesmerizing sight was stiffening his cock so fast that it was caught in a bent-back position. Still, even though this fold pushed it back into his balls, there was an obvious bulge in the front of his pants, and it didn't help when she started fidgeting absent-mindedly and bit her lips as if lost in thought. With her looking away, he couldn't resist looking her up and down and damn if he couldn't see the darkness of black panties under the blue dress. Or was that her pubic hair?
      Realizing she was facing him again, he looked up quickly. She was smiling again, clearly amused. 
      "Don't really know what you want?"
      "That's about the size of it," he said, smiling back at her. "In fact, I don't even know how women's sizes work."
      "Well, you have to get her hips and bust right, or it just won't feel good," she said, then pushed her dress down her thighs while straightening it so it tightened over the front of her body. "How would you compare her to me?"
       "Well she's about your age, but not shaped quite the same," Don said, delighted to stare now, even though it increased the painful pressure in his crotch so much he couldn't help shifting his hips to change his cock's position. Her nipples were getting even harder now, with their crinkled skin now a dark shadow visible through the stretched-out weave. "What's your bust size, a 38 or so?"
      "Actually, only a 36," the girl said, looking down at herself "That number measures around the back and across the front of the bust. Technically, you measure around the back and across the two nipples, but they're not always centered." She amplified on her words by stroking her index fingter from one nipple to the other, absently tracing a tiny circle around each one before letting her hand drop to her belly. 
      "And there's something else, too, isn't there? Cup size?"
      "Very good," she said, meeting his eyes and smiling for a moment before looking down and cradling her right breast in her left hand. "Those numbers - 34 or 38 - have to do with a woman's torso size, so a wide-shouldered woman will have a large size. The cup size, though, refers to the volume of the breast." 
      She squeezed her breast, and the sight of it straining her dress made Don's cock surge so suddenly he swallowed at the discomfort. The bend in it was downright painful now and he wanted desperately to reach in and straighten it out. But how could he do that when Candy was so attentive with those wide open blue eyes?
      "You probably guessed my size high because I wear a D cup, which is pretty big for someone my size," she said, lifting her breast like it was a fruit she was thinking of buying. "It's all a relative thing, depending on how big they are for a woman's height and weight."
      "I see," Don said. His voice sounded a little funny now and he swallowed to moisten his mouth before going on. "But how can I figure out her size? I wouldn't want to get something too tight."
      "Too tight isn't always a bad sign," she said, her face serious as she dropped her eyes to his crotch. Her glance made things worse, almost as if she'd reached out and stroked him, and Don couldn't entirely suppress a groan of discomfort as her gaze rose slowly to meet his. She had a half-smile on her face as she went on. "When I dress for work, for example, I usually dress in form-fitting clothes because it makes it easier to explain things like sizing. I think I make my point better when I use myself as a visual aid. I hope that doesn't make you uncomfortable."
      "You're doing an excellent job," Don said,  feeling a twinge of pain as every heartbeat pulsed more blood into the bend in his cock. "But it's hard, really hard, for me. You see, you're not built quite the same, but I'm not really sure how to describe it. For one thing, her, uh, cup size is probably smaller and hers don't point the same way as yours."
      "Hmmm. Do you hug her?"
      "What?"
      "If she's your niece, you must hug her when you see her, right?"
      "Well, yes."
      "Good. Hug me. And tell me when it you'd expect to feel her breasts touching you. A lot of time, that physical memory is more reliable than visual memory. You might have to hug me pretty tight, if I'm really a lot bigger, but I won't break," she said, opening her arms. "Just pull me against you until, say, our hips touch and that'll give us something to work with."
      Feeling slightly dazed, Don put his arms around her while she laced hers behind his back. Her shorter height meant her arms behind him crossed his belt and her lower hand fell below it, and normally a girl's hand stroking his butt would have been a turn-on. But not now, because her breasts were pressed almost hot against his belly, their heat obvious even through his shirt and her dress. 
      He hesitated when they first touched him, but she pulled herself even closer. 
      "Remember, tell me when it feels like hugging her,"
 she said, flattening herself against him while her fingers dug into his butt. Don couldn't say a word because of his hard-on and she kept pressing clower until her warm belly was nestled firmly against the bulge in his jeans, at which she turned her head to lay  it against his chest. Her breath was hot, too.
      "So, does this feel like your niece hugging you?" she asked, moving her body ever so slightly from side to side, and massaging his throbbing cock with the breathing movements of her belly.
      "Not exactly," Don said, his throat tight. 
      "Since I'm not her, it's understandable that you're getting aroused, but don't let that distract you."
      "Hard not to," Don said, unable to keep  his hips from thrusting his cock against her. She met his thrust with one of her own, swiveling her hips slightly so that her belly seemed to stroke his cock into even greater tension. He groaned slightly, then sighed with disappointment when her hands relaxed and she stepped back and resumed her former stance with hands behind her back. 
      "You were saying her breasts weren't oriented the same way?" she said, swiveling her shoulders slightly. "Why not try orienting mine the same way hers are."
      When he gaped, she sighed, then guided his hands to cup her breasts before lacing them behind her back again. 
      "Just arrange them the way you remember hers," she said as his fingers hefted her heavy flesh. "Are they higher? Do they point forward? Up? Down? Every breast is different."
      "Yours seem softer, for one thing," he said, savoring their warmth. 
      "That'll be because they may be bigger," she said as he lifted them and let his thumbs drift lightly over her tight nipples. 
      Don felt a moment of satisfaction when her eyes closed and she caught her breath. At least he wasn't the only one getting aroused. Her eyes remained closed, and her hips lifted ever so slightly as he massaged her breasts until she blinked and looked up again. 
      "You're distracting me, now," she said, her voice apologetic as her breathing quickened. "And I can't help noticing, too, that your physique looks a little different from other men, at least what I can see." 
      She looked down and brushed her fingers over the rounded bulge of the outermost bend of his cock, and the touch made him wince as it swelled and ached even more.
      "Only difficulty is my position down there," he said, finding it hard to speak. "Got myself in a little knot."
      "I don't like making customers uncomfortable," she said, looking up into his eyes with an apologetic look. ," she said, pushing her fingers under the waistband of his pants and pulling them along his belly to hook behind his belt buckle. "Let's visit the changing room and see if we can change that."
      Walking backward, she towed him through a louvered swinging door. into a small room with hooks on the wall above a full-length mirror. 
      She knelt down before him but he could see her perfect face in the mirror, intent as she unbuckled his belt and began pulling the buttons of his fly from their holes. Don's stomach clench involuntarily and thrust it against the half-opened pants, and she looked up at him with an apologetic look while her fingers continued their work and made his hips thrust again and again in a futile effort to push his throbbing cock against their tantalizing touch.
      "I'm really sorry if this is painful for you," she said, then finished unbuttoning, pulled his jeans down past his boxers, and leaned back to sit on her heels, her gaze fixed on his pulsating cock, as if waiting for it to straighten. But his cock was so hard now that it was jammed even against the loose underpants, the tip tangled in the flap of the opening. And her focus on it made it even worse. Don moaned slightly, his hips surging in helpless spasms toward her face, since the jeans falling down his legs made it impossible to take a step. 
      "It's still tangled," he said, his throat tight. 
      Candy lifted her hands hands hesitantly, then bit her lip, and stopped them an inch from his taut boxers. 
      "Would you mind if I straighten you out?" she asked, looking up at him with moist lips. He couldn't talk now, but nodded, then closed his eyes and tensed when her fingers stroked him through the cloth. "Tell me if I'm hurting you and I promise to stop."
      Don caught his breath when she began working her index finger through the hole, then groaned when she stopped.
      "Does that hurt."
      "No, I think it's helping," he managed to say, even though her finger had stopped against the base of his cock and sent a fresh surge through it. Another finger joined the first, spreading the opening of his boxers, and both slid up the taut skin of his shaft.
      "That's the problem," she said, her voice triumphant as she tweezed her fingers between the bent-together parts of his penis. "All we have to do is straighten that out. Her fingers massaged both the root of his cock now as well as the base of the head and the excruciating pleasure made Don's legs stiffen as well, straightening in anticipation of release.
      The bent part was suddenly cool as it burst through the flap of his boxers but the tip of Don's cock caught in the cloth, hardened more by the rush of blood from the slight relief in the crook. Now, Candy's fingers on one hand were pulling the bent shaft while those on her other hand gently slid the cloth of his boxers past the end of his cock. She gasped when it sprang free and slapped her cheek, then laughed softly while leaning back and squeezing it in her warm hand, making Don's hips strain forward as his balls sucked up to the base of his cock. 
      "That's got to feel better now, so we can get back to your niece's size," she said. Then, though, she lifted her other hand to tease his balls and his hips began thrusting, pushing his balls against her palm while thrusting his cock through the pressure of her other hand toward her face.
      She leaned back away from pulsing head of his cock, slipping to one side and then bumping her head into the corner of the mirrored walls.
      "Wait," she said, but as her lips parted to speak, his cock was pushing against them, muffling her words. Her hand squeezed his shaft, stopping his progress into her mouth, but not before the head of his cock seemed to expand in the moist warmth of her mouth. She was still trying to talk, though, which made a buzzing sensation against his cock head that tingled it into an even harder state and teased it unmercifully when her tongue swirled around it. 
      Don's vision faded and his body began tingling all over while his hips began thrusting in wild abandon, savoring the pressure of her hand on his shaft that kept him from her throat and the yielding movements of her tongue arond his cock head. Her head was trapped in the corner, and her efforts to move it to the side only rubbed the head of his cock against the sides of her mouth harder, making him groan with the feeling.
      Then, vaguely through the tingling tension that filled his body, Don came, his  cock jerking as he shot into her hot wet mouth again and again, his body pulsing long after he had nothing more to pump out. When his sight returned, his body slumped back away from her, the wet head of his cock slithering through her fingers and springing up one last time before sagging into a contented softness.
      Candy stood, her face flushed and her lips pulled down in a slight frown.
      "You're getting distracted," she said. "Don't want to buy something for your niece?"
      "I sure do," Don said. "And I think I'm going to be in here buying her things a lot in the future."