Sensitivity Experiments Pleasure

Hey everyone!

In today's story, a lucky guy is asked to help his professor with a little experiment. It ends up being a bit more intense than he anticipated. It's just a little one-off I threw together, so it's fairly short.

There are two versions of this story. This is the pleasure version, and the one with the happy ending.

The alternate version is focused on pain, and is a lot meaner, in that it contains cbt/ballbusting.

Note: this story was originally a furry one, but I edited it to humans, so some sentences don't flow quite as well.

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Gabriel flexed, testing the metal clamps that held him down to the table. They were far too strong, he'd sooner break his arms than free himself. The ones that held his legs down were the same. He was completely and utterly immobilized, a fact that was not helping his nervousness. He looked up at the woman that had put him in this predicament. "Hey uh, are you sure these are necessary?"

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"I don't know how strong your reaction will be. I don't want to risk getting injured," his professor waved his concern away. Wrapped in her lab coat, she paced back and forth, preparing to start her experiment. She pushed her messy hair aside as she walked to her keyboard. He watched her, having nothing else to do. Though her outfit was not exactly form fitting, the way she kept bending over to type was a nice sight. Anything that could calm his nerves even a little bit was welcome.

Gabriel had had a crush on her for months, ever since he'd first started taking her chemistry class. People had told him that she was a boring professor, but he didn't have a choice. He needed these credits, and she was the only one that taught this particular course. The older woman was an odd character, to say the least. She was casual with her students, telling them to just call her by her name: Claudette. And, yet, she also always spoke like she viewed herself as above everyone, that their trivial lives didn't matter to her. She was clearly extremely passionate with her work, yet from the way she talked, you'd have thought that she didn't care about anything. Her science classes were boring, yes, but they were informative and easy.

Still, as simple as the course was, Gabriel was on the verge of flunking. No matter how hard he studied, he was just barely passing. If he was going to get a good grade, he'd need extra credit.

To his relief, Professor Claudette was willing to give this to him. All he had to do in exchange was assist her with her work. For the most part, this just involved helping her in her lab, after class. She's just make him carry test tubes around, or read off some gauges, or measure stuff. He didn't understand half of what they were doing, so he tried to pass the time by attempting to make conversation. This usually went nowhere. She wasn't really a people person, a fact she openly admitted. If he asked a question, she'd give a short, blunt answer, then return to her work. If he tried to talk about movies, or the news, or anything in between, she'd just shrug and say that she didn't watch television. The only thing that could really get her to talk was asking about her work, which would inevitably send her into a multi-hour speech.

All that to say, she didn't start the conversation very often. Which is why Gabriel had been so surprised when she randomly walked up to him this morning and asked to see his genitals.

It had taken a moment for him to respond to her completely normal request, unsure if he had heard her correctly. His professor repeated herself, motioning to his groin, "I need to examine your testicles."

"W-what? Why?" Gabriel asked, taking a step back in disbelief.

Sighing, she stated that she needed his dick for an experiment. He began to ask what kind of experiment, but she refused to elaborate. Knowing about it beforehand could change the results, she explained. The data she was looking for all hinged on his "unbiased reactions." He wasn't really sure what this meant, but she eventually convinced him to pull down his pants. Promising that she'd give him an A for the whole course if he helped her today, she watched as he undid his belt and exposed himself.

Truth be told, Gabriel was not opposed to showing his cock to her. He wanted to do much more with it, in fact. It was just that his fantasy had always been just that: a fantasy. Never would he have expected to actually have a shot with his professor. Would he have fucked her right there, right then, if she had asked? Yes, without hesitation. But she wasn't asking for that, she was just requesting to see him naked. A logical first step, he realized, but he never thought he even make it this far. Curious, and a little hopeful, he pulled out his dick and balls, hoping she wouldn't be offended by his erection.

It seemed that she wasn't, given the way that she immediately reached out to grab it. Moving it from side to side, so that she could get a good look at it, she gave it a single stroke from base to tip. Though her expression was completely neutral, she seemed to approve, adjusting her glasses as she spoke, "Ah, a good specimen. This'll work just fine."

It took every ounce of willpower for him to not cum in her hand. He couldn't believe this was actually happening. Claudette might have been a good bit older than him, but half the reason he did so badly in class was because he just couldn't keep his eyes off of her. Her cute little glasses, the way she smiled she got excited over her experiments, she was just so damn pretty. And now she was actually offering to give him an A if she got to touch his cock! He must have been dreaming, there was no way this was real.

Overwhelmed by the amazing view of her face right next to his dick, he didn't realize she was talking until she repeated herself. "I said follow me. I've been preparing for this for weeks, so I don't wish to wait any longer."

And thus, Gabriel now found himself naked and strapped to a metal table. She was kinkier than he would've thought. He'd been tied down before, but not like this. The thought of what she was going to do to him was both exciting, and a little intimidating. Every time he tried to ask for an explanation, she just ignored him.

Finally, after a few good minutes of typing, she moved to stand beside him. Holding up a small voice recorder, she spoke into it, "G.S.R. testing log, September twenty-first. Subject: Male, twenty-two years old. Subject appears nervous, as evidenced by the way he's looking around and avoiding eye contact."

"You know I can hear you, right?"

"Subject has successfully maintained an erection for twelve minutes, with no physical contact. All recording systems are ready, beginning control test." With this, Claudette began to reach for his cock, only to stop and pause. She looked down as she considered something, before turning to look him in the eye. "Do you want to look at my breasts?"

"H-huh?" he stuttered, unable to help himself from looking at her chest.

"My breasts. Er, I believe people online call them 'tits.' According to my research, the sight of them makes males become aroused. Is this true for you?"

Gabriel replied in the affirmative, trying not to sound too excited. Nodding, his professor unbuttoned her lab coat and placed it on the table. She was wearing pants, but nothing on her top half. His eyes widened as her boobs bounced slightly. They were even more perfect than he'd imagined. Oh, what he wouldn't give to feel those tits wrapped around his cock right now. Those breasts were the focus of most of his fantasies. When he jerked off, he'd always imagine his professor wrapping her tits around his cock, pumping until he blew his load all over them. He wanted so desperately to know what they felt like. If he hadn't been restrained, there was no way on Earth he would've been able to stop himself from grabbing them. His dick throbbed, leaking a bit of pre-cum, which she noted to her recorder.

Slightly grinning at the effect her chest was having on the horny male, she slowly wrapped her fingers around his length. She rubbed her thumb along the back of the head, watching his face as she did so. The boy gave a small sigh of pleasure, trying to thrust up into her touch. Satisfied at his reaction, her hand began pumping up and down in a somewhat mechanical fashion, as if she was unsure of what she was doing.

Gabriel also didn't seem to know what he was supposed to do. Would reacting be unprofessional? Did she want him to stay quiet? What about cumming, was that allowed? He asked her this, and she assured him it was fine.

"Just relax, and please don't hold back your climax. I require your raw reactions. My apologies if my technique is not up to par," Claudette spoke as she squeezed his shaft tighter, "I've watched several tutorials online, but haven't had a chance to practice before. If there is anything you'd prefer I do, please let me know."

"C-could you... twist your hand a little?" Gabriel said between breaths. She nodded, doing as he asked. With another deep sigh, he rested his head back, eyes locked to her tits. How many times had he stroked himself, imagining that it was her hand instead of his? He hadn't counted, but it must have been a few dozen times. It was only a dry handjob, but that was more than enough for him."Oh fuck, that feels amazing!"

"Could you describe the sensation in more detail, please? As thoroughly as you can?"

"Um, I... I don't know? It... it just feels good."

"I need you to be more specific than that."

"Uh, the pleasure grows when you stroke up, and feels the best when you touch the tip, I guess."

His professor seemed disappointed at his answer, but continued with her stroking. A huge smile formed on his face as he watched her hand pump up and down. Damn, he really needed this. After staying up multiple nights studying, it felt so good to just sit back and relax. Though she had only started a few minutes ago, it wasn't long before his cock began throbbing harder, a change she noted. "Subject's penis has begun to pulsate more frequently. Subject may be approaching orgasm."

Indeed he was. Gabriel wanted to draw this out longer, but the older woman was just too hot. He tried to discreetly angle his hips toward her, hoping to paint her amazing tits white. She did say it was fine if it got on her, after all. Placing her other hand on his thigh, she leaned in, wanting to watch his cumshot. Hips bucking, he didn't care if his ragged moans were embarrassing or not. His dream was actually about to come true! His limbs strained against the metal clamps, his back arching as much as it could. "I'm c-cumming! Claudette!"

She said nothing, continuing to pump as he blasted two ropes of seed across her left tit, and one across her right. Another, weaker shot hit her in the stomach, while a few more sprayed all over her hand, running down his shaft and balls. Each spurt was smaller than the last, but he still had a few more to go. She gasped out in surprise, watching as her student's cock continued to drool cum for several more seconds. After one more small shot, his massive, content sigh signaled that he was done. The sight of her chest covered in his cum only added to his satisfaction. It was a view he'd never forget.

"That was... more than I expected," said Claudette. Though she stopped pumping, she kept a firm grip on the base. Examining his softening length, she wiped a bit of cum off her tits, playing with it between her fingers. He briefly hoped that she would taste it, but alas, she just wiped it on his leg. "Is this a normal amount for you?"

Trying to calm down, Gabriel shook his head. "Uh, no... or kinda. I mean, not quite that much. I don't know, I've never measured it."

"Why not?"

"I've... never thought too?"

"Hmm, if I had a penis, I know I'd certainly be curious." Claudette turned and stepped away, grabbing a towel to wipe her cum covered hands. Her boobs, meanwhile, she didn't clean off. The way they jiggled ever so slightly as she scrubbed her hands, made him even more desperate to touch them. He felt tempted to say that she could measure his cumshots as much as she wanted, but decided not to push his luck. Picking up the recorder, she spoke into it again. "Control test results: three minutes and twenty-eight seconds. Subject's reaction was consistent with the typical male orgasm, and his penis has become flaccid as expected. Subject has also notably not moved his gaze from my breasts since the control test began."

With a blush, he looked away, "I'm sorry, I didn't mean to stare! Your boobs are just really beautiful... I mean you are beautiful. Not that I'm like, attracted to you or anything, I mean I am, you're pretty... I just meant... uh... I'll shut up now."

Great, now she thought he was some weird, horny pervert. Way to fuck it up.

His professor stared at him for several seconds, as he shifted uncomfortably. With the tiniest hint of a slime, she brought the recorder to her mouth again. "Subject appears to be displaying symptoms of the condition commonly referred to as 'post-nut clarity.'"

Gabriel said nothing. Waiting out the awkward silence, he watched as she grabbed a small flask, stirring it to make sure there were no bubbles. Placing it on a scale and checking the weight, she quickly typed something on her keyboard. Seemingly satisfied, she walked back to the table with it.

"Now then, let's begin the experiment."

Her student raised an eyebrow, "That wasn't it?"

There was going to be more? Oh boy, this just kept getting better by the second.

"No, that was just a control test. I needed to see your reaction to a regular orgasm first." She placed her hand on his stretched out arm, leaning in until her tits were inches from his face. There was no way she wasn't doing this on purpose, he thought.

"'Regular' orgasm? What does that mean?"

"Patience. We need you to get erect again first."

"Uh, I can't get hard that fast."

"Patience," Clauduette repeated as she held up the flask to his mouth. She told him to drink it, which he did after some hesitation. The clear liquid had a strong, salty flavor. It tasted almost like, well, cum. With a grimace, he swallowed it down, and asked if it was some kind of aphrodisiac. She grinned, "Of a sort."

Before Gabriel could reply, a strange feeling seemed to wash over his body. His head began to swim as something stirred deep in his pelvis. A warm pressure, traveling through his insides. He shuddered as it slowly shifted downward, until it reached the base of his cock. With eyes wide in surprise, he watched as the feeling engulfed his genitals. Within seconds, his flaccid length rapidly hardened, growing back to its usual erect size. Still, the pressure continued to grow, his dick hardening more and more, to the point that it was nearly starting to hurt. As this happened, his balls simultaneously felt like they were ballooning, until they felt nearly double in size. It was like his cum was boiling, churning for release. He'd gotten some pretty bad blue-balls before, but this was way worse. Straining his neck to see, Gabriel half expected his balls to explode from the pressure. Shockingly, the two spheres seemed perfectly fine, if a tad bigger than usual. The pressure kept building for a few more seconds, until, mercifully, it stopped. It took nearly a full minute for it to dissipate fully, his cock remaining hard all the while.

"Woah, what the hell? What was that?"

Claudette gently pushed his head back down, as she spoke into her recorder. "G.S.E. administered successfully. Penis achieved full erection in four seconds, and testicles appeared to shift in the scrotum. Subject seems disoriented, but otherwise alright. Beginning experiment proper."

Gabriel was too focused on what just happened to hear anything she said. "How did you... what was that stu- AAAH!"

The woman lightly ran her finger across the tip. He instantly flinched, his limbs straining against the clamps as he tried to bend at the waist. A blast of pleasure enveloped his dick, more intense than anything he'd ever felt in his life. Claudette took a step back at his reaction, watching as his cock throbbed violently, oozing pre-cum. Panting, the boy's brain struggled to comprehend what just happened. Had he just climaxed again? There was semen all over his cock. Could he have came again that fast? Wait, no, that was from his previous orgasm. Why did it feel like he just came, then?

Before he could verbalize these questions, she rubbed her finger down the front of his dick. Immediately, he gasped again, body shuddering. That tiny bit of pressure utterly assaulted him with pleasure. His cock (already sensitive from his recent climax), was barely even being touched, and yet that earlier orgasm paled in comparison to how good this felt.

"G.S.E. seems to be performing as anticipated," Claudette said into the recorder. Unlike before, her tone was a lot more enthusiastic. She was even fully smiling, a rare sight. "Subject is reacting much stronger to stimulation. His pupils have dilated, and he is breathing heavily. Given the way his hips are thrusting, it seems that he desires more stimulation. I may finally have a working prototype!"

Both his teeth and fists clenched as he took a deep breath. "What the fuck did you give me!?"

"I call it the 'Genital Sensitivity Enhancer,'" she answered, "It's a prototype serum I created that changes the way your brain receives and interprets signals. It increases the intensity of sexual stimulation by roughly three orders of magnitude! Additionally, it forces more blood flow to the genitals, forcing an erection, and accelerating the rate at which your body produces semen!"

"W-w-what?" he asked, not catching a single word she said.

In a rare showing of emotion, Claudette rolled her eyes with a huff. "How do I put this in even more simple terms? It... it makes it feel better when I touch your 'cock,' and makes you 'cum' more."

As the woman spoke, she began pumping his dick again. Her technique was exactly the same as before, but his reaction were much, much more intense. Instead of soft moans, Gabriel full-on yelled. He pushed against the clamps, but they held him tight, leaving him unable to move. The metal table shook against the floor as he desperately bucked. Whether this was an attempt to gain more pleasure, or to escape from it, she couldn't tell. Using his semen as lube to grease up his dick, she cocked her head, continuing.

His eyes began to roll back as he yelled out. "AAAH! Stop! I c-can't! Oh fuuuuck! Wait!"

"This is the first prototype formula I've gotten working," she said, casually. "I don't believe in testing on myself, so you're my first subject. The effects will wear off in a few hours, so I'm hoping to learn as much as I can before then."

Her student replied with a series of incoherent cries. He could barely even breathe at this point. His mind just couldn't handle the horrific, mind-destroying levels of pleasure that was bathing his lower half. The best sex of his life didn't even come close to matching this handjob. Every stroke was a shockwave of pleasure. Every twist of her hand was an incomprehensible, heavenly explosion of sexual delight. It was too much. He couldn't take any more. He just couldn't.

Despite his pleas, his professor didn't slow down for a second. She continued to stroke him, watching his cock throb and pulse with every little movement of her hand. It had taken her nearly three years to get this serum working, she was going to make the most of it. That meant more stroking, and a tighter grip.

Gabriel was far past screaming now. The pleasure was overwhelming him so much that he could do nothing but mewl. He couldn't hear what she was saying, his brain couldn't handle any other signals right now. He couldn't even look down at her tits anymore, he was so exhausted. As her fingers brushed the tip, squeezing it into her palm, the pleasure would burn even hotter. The sensation was multiplied with every pump, building upon itself over and over and over again. His arms and legs were starting to give out, and he was soon reduced to just lying there as she tortured him with pleasure. He didn't even know it was possible for something to feel this good. It shouldn't have been possible. Was he going to die from sheer pleasure? Was she actually going to kill him with just a handjob?