Erotic Couplings

Exploring the scientific aspects of sexuality.

Attractive instructor and passionate student obtain potion increasing sexual desire.

Spankmasters
May 27, 2024
14 min read
studentboobsScience sexbig cockblowjobanalbig boobsteacher
Science sex
Science sex

Exploring the scientific aspects of sexuality.

Over the course of the past 3 years, Ms. Luna Cain had become a well-known figure in her Houston high school, thanks to her exceptional work as a chemistry teacher. Not only had she managed to boost academics, but she had also turned the course into a highly coveted program that rivaled those across the country. Her students consistently won prizes and scholarships, attracting recognition even from the local university. All this was achieved before her 29th birthday.

However, not everything in her life was perfect. Despite her impressive achievements, Ms. Cain had yet to make any real friends in the neighborhood. Most people were drawn to her because of her family's connections to New York real estates, expecting lavish dinners or career advancement within her mother-in-law's firm. But they were also intimidated by her stature, with her toned muscles, sculpted abs, massive breasts, and prominent rear end.

To conceal her figure, she had been wearing long skirts and voluminous dresses. Nonetheless, everyone could tell that she was not the typical teacher. Even so, it helped to boost her students' performance as they tried to impress her.

Ms. Cain was not interested in relationships. Not with students, anyway. She was more focused on her career. While she enjoyed sex, she found it difficult to find someone who could keep up with her. Most of her partners lasted only minutes. She resorted to using toys and her imagination.

All of that changed when Clark came into her life.

Clark was 6'2" and had been held back a year. Though he didn't stand out among his peers, he was a thoughtful writer who had a few admirers. However, he had one secret: he spent most of his free time at the gym, trying to bulk up and impress the opposite sex. Unfortunately, his efforts went unnoticed most of the time.

He was particularly drawn to Ms. Cain, seeing her as a mature, beautiful woman with a perfect body. She was always covered up, though. He imagined confessing his feelings to her, only for her to acknowledge his prowess and let him "ravage" her perfect body. It was one of several fantasies he'd had about this teacher, whose every movement filled him with desire.

One day, a small accident occurred in the lab during cleaning. Clark had been lost in thought over some porn he'd watched the night before. When he turned around to leave, he knocked into a beaker full of a volatile mix of his and Ms. Cain's concoction, resulting in a sticky, disruptive mess.

As he watched Ms. Cain change out of her soiled clothes, he realized that she had been covering up one of the most beautiful bodies he had ever seen: a curvaceous figure accentuated by her tight underwear. He felt a surge of desire. His balls felt like they were filling up, and emotions he couldn't identify coursed through his body.

The consequences of the spilled formula quickly became apparent - Ms. Cain's nipples were clearly visible through her shirt. She also smelled different, as if she were secreting pheromones.

In the days that followed, Clark found himself heavily aroused, even occasionally getting erections at inopportune moments. When he went back to her classroom after everyone else had left, he could see her curvy figure against the dark backdrop. It was an addictive combination of her high-pressure job and her well-toned figure that had caught his attention.

That's when things got weird. Clark tried to apologize, but she turned the situation around:

"Do you know what you spilled onto us?"

"The class experiment we were doing?"

"No, you stupid boy, that wasn't formaldehyde! You don't know what you did?"

"I... I think so," he stammered.

"It was an aphrodisiac."

To be continued.

With a heavy sigh, she pulled out a piece of paper that contained a formula. "To be honest, this wasn't what I was working on. I was actually trying to create some drugs for a friend -- an energy booster." She pointed at Clark's pants. "Apparently, it's had an unexpected effect."

Clark now understood. "I'm sorry," he said, trying to cover it by shifting in his seat.

"It's alright," she responded, her voice calm. "But we need to fix this, or you could die, and then there would be a medical report, and we'd both be in deep trouble." He stopped, nervous about what she had to say next. "Just sit on the table, I'll fix this."

Obediently, Clark followed her instructions. She walked to her bag, revealing her slender figure. Her tight blue gym leggings hugged her hips and thighs, outlining her curvy behind. Turning around, he could see her white shirt barely containing her large, firm breasts. "By the way, these are the more casual clothes I wear," she explained. He also noticed her toned arms and voluptuous figure. His erection grew even larger at the sight of Miss Cain.

She opened her bag and retrieved something. "You'll need to take off your pants and underwear." His breath caught in his throat as she revealed a big tub.

She approached him, kneeling in front of him. She examined his stretched marks, running a hand along his leg. "This is quite the situation," she said, squeezing his cock through his pants, feeling the massive head and thick veins. Clark grunted in appreciation. "I'm just going to ejaculate you. Since I don't have a machine, I need to do it myself. As soon as that happens, the effect will wear off and you can leave."

Kneeling down, she removed the zipper and pulled his underwear down, revealing his massive cock. "Holy shit," she whispered, staring at the nearly 9-inch long dick with its thick veins. "And it's so thick!"

The head was a deep red and the rest was of smooth, silky skin. There was only one vein along the side of his shaft. His testicles were the size of tennis balls, and they were filled with semen. Some pre-cum was already leaking out, leaving a glistening trail.

Clark looked embarrassed, but his attention was diverted when she opened her mouth and tasted the pre-cum. He was shocked but also aroused by her actions.

She spread some lube on her hands. "Remember how they used lube during the sex seminar? This is what it's for." She gently held his cock's base, just about able to wrap her hand around his hardness. Clark felt a wave of pleasure as she stroked him. "Just tell me when to stop when you cum, okay?"

Gently, she began to stroke his penis. "I miss having sex," she mused, stroking him with surprising skill. Clark was enjoying the feeling of his crush touching him, and he loved the way her cleavage swayed as she fondled him. This was the dream he'd had all along -- fucking his crush.

She paused for a moment, licking her lips. "Should I taste it?" She licked the pre-cum on his cock, and he responded with a deep moan. She held a hand on his shaft and licked from the base to the head. His balls had become so heavy she could only squeeze one at a time. She returned to the task at hand, stroking him with ease. He was close to reaching his climax.

Suddenly, she spoke. "Do you watch porn?" Clark nodded. "And are those people in the videos supposed to be real?" He nodded again. "Well, most of the time, they're actors," she said. "They make it look like that." He looked confused. "But you're literally the biggest guy I've ever seen."

She leaned into him, pressing her breasts against his chest. "I'm going to suck you. It's what I think would feel the best."

She lowered her head and engulfed his cock, taking him deep into her mouth. Clark couldn't believe it. His dreams were finally coming true; he was having sex with a goddess.

She removed her mouth and saw some pre-cum. "Taste it," she instructed. He complied, and was even more delighted when she sucked it off his cock. "I didn't know I'd be so good at this." She returned to her work, stroking him slowly, then faster as he building to his climax. He looked into her eyes, trying to hold off his release. "How do you feel?"

"Amazing," he gasped. "I never thought this could happen."

"I haven't been with anyone for a while," she admitted. "I'm not sure what's considered 'normal' for you, but everything feels great." She returned to her task and stroked him until he released.

Satisfied, she stood up and walked back to her bag. "It's all cleaned up now." Clark, still breathless from the experience, thanked her as he zipped up his pants. "See you at school tomorrow."

He winced in pain when her lips engulfed his cock in her mouth as she pumped it a few times before she stopped to say something. "I'm only doing this to speed things up," she said. "You need this out of your system, and I'm good at what I do. Once it's done, I'll spit it out."

As the sensitive head of his cock slid in and out of her mouth, he could feel his arousal soar. Ms. Cain was an expert at what she did, and the combined sensation of her soft lips and rhythmic movements were driving him wild. Her tongue danced over his sensitive spots, making him moan.

"I'm going to cum!" he gasped, grabbing her head and forcing himself deeper into her throat. His balls tightened as he felt his cum rise, filling her throat. She gagged as some of his cum splattered on her shirt. She pulled out and swallowed, still tasting his cum. "Delicious," she said with a smirk.

"This was my first time," Clark confessed, feeling embarrassed.

"Well, I can tell you'll have plenty more before long," Luna grinned. She watched as his cock softened slightly but quickly grew back to its full length. "You know, I never thought I'd be here doing this, but I don't mind," she chuckled, "What can I say, I was overdue for a good fuck."

"You make it sound so... easy," he said. "This is more of a drug than an energy booster, isn't it?"

Luna laughed. "It's a little potent, isn't it? I was actually making a drug to help people last longer in bed before it got away from me."

The thought of his first-time sex partner being a drug developer and chemist blew his mind. Suddenly everything about tonight made sense. "You mean you got some of this on yourself earlier?" he asked, a realization dawning on him.

"Yeah, I did. I didn't have time to wash it off before we started."

There was only one thing Clark wanted to do. "So, what do you say? Want to teach me how to get better at this?" he asked while guiding Ms. Cain to her apartment near the school.

As they walked, Luna's ass swayed in her leggings, mesmerizing Clark until he could barely hide his arousal. She pulled up her shirt to reveal her toned, sweaty body. "Alright," she said, lowering her voice. "But let's not make a show of it, okay?"

At the street to cross to her apartment, they had to wait at the traffic light. While waiting, Luna stroked his rock-hard dick through his pants. "See, it's not as potent as before, but I still won't leave it alone."

When they reached her apartment, the hallway had a white-themed decor, with some flowers, a modest kitchen, and small sofa room. There were also some awards hanging on the walls for her achievements and a poster of Doctor Who. "Wait, you still watch that?" she asked as she caught him looking at it.

"No, but I will after this," he said, his mind already planning their future viewing sessions together.

Luna took him to her bedroom, which had a huge red bed in the center, a desk in the corner, and a cabinet stocked with skincare products. "This is as private as it gets," she said, indicating the gap between her apartment and the school.

She shed her leggings, showing him her curvy figure. "You're more of a handsome guy than I thought you'd be," she said as she crawled on the bed. She let him take off her bra and panties, looked at his impressive body, and how he'd quickly recovered after cumming in her mouth. "Well, that explains a lot," she muttered while unbuttoning his pants. "Time to teach you some sexy skills."

Clark started shaking in anticipation as Luna pushed him down on the bed and began to guide him through the art of love.

Then they removed their pants. Both noticed each other's crotches. From Clark's perspective, a lovely buttocks and a noticeable camel toe appeared wet under red panties. From Ms. Cain's point of view, a humongous cock was visible, nearly bulging out of black boxers. He took off the boxers, revealing a cock standing tall and confident, dripping with cum. It looked as if it had even grown slightly.

She sat on the bed and removed her panties, showcasing her shaved pussy. "So you want to start with...?" she purred seductively, grabbing her breasts. "Want these?" She spread her legs wider, revealing her pussy already soaked. "Or this?" She turned around, presenting her ass. "Or-".

She couldn't finish as Clark reached for her breasts from behind. He squeezed her nipples, passionately kissing her neck. She emitted a sensual moan. This behavior was unexpected from someone so timid just hours earlier. His cock rubbed her ass and pussy.

He lifted his head, saying, "We'll try some other stuff first." Then, he kissed her again, their tongues wrestling. He withdrew. "Before I fuck you."

He turned her around to face the bed. He grabbed one nipple, sucking it as he played with the other. She was completely aroused at this point. She felt his dick rub against her pussy. She was dying for sex with someone, but Clark was about to have her.

He moved to the other nipple, twisting and twirling it. Her nipples were erect by the time he was done. Taking advantage of the moment, he nestled his face between her breasts, saying, "I've always wanted to do that."

He stretched his legs out on her sides and placed his cock between her breasts. "A full tit-fuck, if you'd like," Ms. Cain offered. She accommodated him, allowing her breasts to envelope his cock while she rubbed it with her hands.

As she began sucking his cock, the sensation was overwhelming. He seemed to be enjoying himself, rubbing his erection up and down her breasts. Suddenly, she experienced a moment of blissful enjoyment. He wasn't soft, but he remained the same size.

Then, a revelation hit her. "Wait a second," Ms. Cain said, eliciting Clark's attention. She approached a drawer. From the corner of Clark's eye, he could see toys: dildos, smaller than him, anal beads, a leather cap, and in her hand, a condom.

"This will fit. Put it on while I clean myself," Ms. Cain instructed before leaving for the bathroom.

Intrigued by the sight, Clark took a closer look at the condom. He'd never used one before and hadn't noticed the label. It was a large XXL size and had a plastic texture, but was lubed on the inside. It was challenging to put it on because he had to apply considerable force, managing to get only two-thirds of the way before running out. He heard the bathroom door open and witnessed her return.

Ms. Cain's reaction was fascinating. She was enchanted by the condom's origin. This was worn by a man much bigger than she had ever been with. She briefly considered stopping, but the allure of the situation prevailed. Here she was, getting ready to be completely filled by him.

She leaned over the bed, presenting her ass towards him. "Here is your prize, buddy," she taunted, jiggling her ass slightly.

Clark walked towards her to assume a position. His cock slapped both her holes, driving Ms. Cain wild with desire.

He seemed to strategically position his cock, grinding it against her vagina and anus. He dipped his fingers into her pussy, eliciting a loud moan from Ms. Cain.

Her mind went blank, something she hadn't experienced in quite some time. She'd fantasized about it countless times but couldn't imagine how amazing the real thing would truly be. She murmured, "Oh my god! That's fucking fantastic!"

Clark was thrusting deeply into her. It should have felt good, but there was an unfamiliar discomfort.

He stopped. Ms. Cain turned around, revealing the cause of his pause. "This part's hurting," she admitted, pointing to her abdomen. Indeed, the condom seemed to be stretching near its limit around Clark's cock.

"Should I stop?" he asked.

"No, it's just...this has never happened," she clarified, gesturing to her belly.

"Will I continue?"

"Yes," she affirmed.

He resumed thrusting, moving in and out. The movements were manageable for him, easy for her. However, she had never experienced anything like this before. The head of his cock collided with her G-spot each time it entered her. The rhythm also pushed her intestines.

"You satisfied me at the beginning. Now, let me satisfy you more," Ms. Cain whispered, immersed in pleasure.

Clark penetrated her rhythmically. She was at the pinnacle of pleasure, her mind devoid of any thoughts. She'd long dreamed of this moment, but its reality was beyond her wildest expectations.

"Oh god! That's amazing!" Ms. Cain cried out.

Clark pounded her with increased intensity, taking her to even greater heights. Although it was uncomfortable, it felt wonderful. He pulled out. She watched, bewildered by his sudden cessation. "I'm going to take this off. It hurts."

"It's okay." She appeared as he removed the condom.

"I'm at the stage of my monthly cycle where it's unlikely I'll get pregnant. Just be cautious, as there could be increased discharge."

She climbed over him, pushing him down onto the bed. This time she mounted him, occupying the bed on top. "I'll show you how to fuck a woman." She slid the penis underneath her vagina and descended, managing to swallow a significant amount but struggling with the first two inches.

"You're bloody tight!" He smacked her ass, causing her to yelp. She was advancing toward her navel, with her eyes rolling back in pleasure as the penis delved deep within her.

"I must admit, it's been a long time since I've had sex like this." She surged up and down the length of the penis. Clark sensed his dick immersed in her lips, feeling the suction and rubbing sensations as it swirled around. "I assumed no one could last me this long. I didn't think it would end up on such a well-endowed beautiful cock like this!" She discovered it struck her spot each and every time she descended, from her vagina to her womb.

She surged in a whirlwind, allowing her breasts to sway and jiggle. "I've yearned to fuck you, Ms. ever since I saw you at school. You attempted to conceal your curves and breasts, but failed. I've fantasized about fucking you for years." He started to move, sitting up as she wrapped her legs around him.

"Quit calling me Ms. My name is Luna."

"That's a lovely name." Clark kissed her, and she responded. He lifted her up and wedged her against the wall while he continued fucking her.

Then she experienced an orgasm. "Oh my God, I'm cumming! I'm cumming!" He perceived it as well, as he dispatched his sperm deep into her womb and vagina. His hands implanted her ass fiercely as he pumped her deeper. She arched her back, allowing the surge to spread over her. "Good God, that was terrific."

He laid her back down on the bed, but then felt another rise in his penis. "I'm not done yet?" He inspected his penis to see it remained erect.

Luna perched her rear up to him. "There's another hole you need to penetrate." She split her cheeks apart to reveal her anus.

He thrust his penis into her anus almost instantly, causing her to shriek with delight into the pillow. He gripped her ass firmly, pushing deeper, always retiring until he was only seconds from fully sliding out, then returning.

Then he began to cum and inundate her anus with his sperm. He withdrew and turned her around to face him. He kissed her neck, biting gently as she embraced him. "I've never had someone do what you just did, Clark."

"I've never been on a date before, but tonight surpassed my expectations."

They cozied up together throughout the night.

As the sun emerged, Luna awoke to see a handsome man beside her. For the first time in a long period, everything felt right. She could admire him sleeping and loved the view of his muscular chest and the stiff morning boner pointing toward her stomach. "I love you," she whispered.

He opened his eyes. "I know."

"You know," she rubbed his cock. "I suspect we both got past the initial time we reached orgasm."

"So?"

"I believe we've each found a fuck friend. Someone who enjoys what we enjoy and keeps up with one another."

"Sounds reasonable."

"Next week?"

"Yes. After school until the evening?"

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