Science Sex
Erotic Couplings Story

Science Sex

by Crosslord 18 min read 4.5 (15,200 views)
teacher student big boobs big coc blowjob anal boobs
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Over the last 3 years in Houston, Ms Luna Cain had made a name for herself as the chemistry teacher in her high school. Not only had she improved academically she had transformed the course to be seen as better than the rest of the country by tenfold, her students having won several prizes and scholarships. She was recognised by the local university being consulted at times.

All before her 29th birthday. However there were problems in her life.

In the area she lived in, she had no true friends. Most were around her since her family were so connected to rich New York real estate they wanted to be with her to have fancy dinners or promotion in her mothers law firm. But most were intimidated by her looks with her muscles and size.

At 5'4 she was not tall. However, Doing exercises everyday left her toned with abs she would like to show off more, though most men were intimidated by them. Her boobs were massive and her ass hung out at a perfect ratio to complete her form. On the side and back her head was shaved though her top was combed onto a side leaving her with a distinct cut.

She had hidden her figure over the last 3 years by wearing long skirts and big dresses though most saw through it. That's why the grades went up. All the boys wanted to impress her, to try and date her. She turned them down, reluctantly.

She loved sex and would love to hook up with someone though whenever she did they would never match her stamina. In one case he came on the first touch. Usually she had to please herself using sex toys and her imagination.

She didn't care. She was only happy her job was easy, since they did anything she said. She didn't want some relationship with a student destroying her life.

That is until Clark.

Clark at 6'2 stood well above her having been held back a year. He was quiet though thoughtful in his writing and seemed liked by the others, though not popular. Indeed he didn't seem unique until after class.

He would go to the gym and pump iron. His muscles while not noticeable under his baggy clothes were impressive when shown. Though he did that to compensate for no one dating him. He was called a "freak" and "horse" for the size of his dick by girls.

Looking online he was disappointed by the average-ness in comparison to those he watched fuck girls. He thought he'd never "score".

Didn't stop him masterbating to Ms Cain. God how he'd fuck her. She was a mature and beautiful woman, stacked and perfect. He'd often dream about confessing his feelings to her, her using her luscious lips to suck his dick and let him rail her beautiful ass she so desperately tried to hide. He imagined fucking her after class blowing his load into her...

Sooner than he'd imagine. On one faithful day all changed.

Clearing away his experiments after the others one day, thinking about some porn he'd seen last night. A student dominated a teacher like Ms Cain. He imagined himself and Ms Cain moaning to him railing her on a table. Since it was Friday he was trying to planning some alone time for himself with his parents going away.

He was so distracted he didn't hear Ms Cain behind him as he turned with the tubs for the bin. He moved away from her to avoid the beautiful boobs and hit the central table. Then a rumble.

He'd knocked one of the beakers off the teachers table, spilling some fluid, a mix of his and the teachers, onto himself and Ms Cain. At first nothing came of it aside from him seeing through her white shirt her massive rack behind a beautiful red bra. Then he saw he had his hand on her boobs. He withdrew quickly.

Some of the other students laughed. After getting up she covered her chest with a lab coat. "Clark!", she yelled. She moved closer to him. He could see her cleavage. "I'll have a word with you after the class!" She huffed and left the room while everyone else laughed and cleared out.

Clark finished cleaning up and left, dreading returning to that room. He liked her and had chosen that class to be near her. Though this might be the end.

Ms Cain huffed going to the bathroom to change. she'd look up to that guy later, the one who knocked her down and squeezed her boob.

She took off her dress and bra to change and looked at her breasts. Her nipples were hard. And she remembered the formula.

"Shit."

After going around his remaining hours in school he felt off. Like something was stirring within him. He noticed women's breasts and asses having to turn away to avoid being seen looking at them at several points.

He was already horny but now he felt something more, his balls feeling like they were swelling. He smelt different. Possibly fear, he thought.

At the end of the day he came back to her classroom after everyone else had left. Its windows were covered by the blinds with all the lights off, only a light to the side off. Ms Cain was in the shadows, her figure different now openly curvy.

He started an apology. "Miss, I am so sorry I didn't-"

"Do you know what you spilled onto us?"

"The class experiment we were doing?"

Sighing, she pulled out a sheet with a formula. "I hate to say it but that is not what I was doing. See I've been trying to develop some drugs for a friend. An energy booster." She pointed to his trousers. "I can see it's had an unforeseen effect."

Clark could now see it. His bulge hard against his trouser leg. "Sorry, sorry!", he said, trying to cover it by moving.

"No it's fine Clark. I shouldn't have been doing this on school property. But this has to be fixed or you'll die and a medical report will be filled and we'll both be fucked." He stopped in fear. He turned to hear what she was about to say next. "Look, just sit on the table, I'll fix this."

Clark did as told. She walked over to her bag to get something revealing her figure. He saw that she was in different, casual clothes: some blue gym leggings hugging her skin tightly, defining her ass and thighs, and when she turned around he could see a white shirt barely hiding her massive firm boobies along with deep cleavage, which, no longer in a dress or compressed bra, he could see in their round glory. He could also see her muscles on her arms and her voluptuous shape clearly. His erection grew larger with Miss Cain noticing as she walked over to him with a tub.

She kneeled down to see the stretched marks, and put her hand on his leg. She squeezed Clarks cock inside his trouser leg feeling the massive head and thick veins. "Wow, this is bigger than I thought", was all she could think. She rubbed it a bit just to appreciate the size. Clark grunted. "All I'm going to do is ejaculate you, since I've got no machine. I know the cliche but this is the only way to get rid of it and cased no damage. I need to be sure it's done myself. When that's done the effect will discharge and you can go."

With wet excitement she pulled the zip and underwear down and the massive cock slapped her in the face. Regaining her position she saw the cock stood at nearly 9 inches, its massive head pointing straight at her. "God!" She exclaimed. "It's massive!".

The head was big meaty red while the rest was thick silk smooth skin shaved the way she liked. Only a single vein traveled the dick on the side. His balls were the size of tennis balls and swelling full of cum. Already some pre-cum had emerged leaving a beautiful shine.

He looked ashamed, turning his head. "It's not as big as the others"

"You mean the others have cocks like these?" She was starting to get excited.

"In the videos I've seen online", he admitted in a defeated tone.

Then it clicked in her head. "He thinks those porn videos are real! That's why he hasn't objected so far." She let out a laugh. "Oh Clark, most of those are actors filmed to look that way. It's rare for an actual thing this big. In fact you're the biggest I've seen, in person". She gave him a deep kiss on the lips, just to lighten the mood, fighting the frigid loose tongue stopping after a brief moment, then wrestling his tongue. He gazed into her when she let go. "You'll go far". He flustered at her response. "But first I'll deal with this".

First she took out some cream from the tub and rubbed it in her hands. "Remember the sex seminar with lube? This is how it's used". She wrapped her hands around the cock base just about able to hold the thing. Clark winced though was overjoyed at the sensation of her soft hands stroking his cock spreading the lube. "Just tell me when to stop when you cum, ok?"

She was gentle yet firm. Stroking his cock she realized how long since she'd fucked another person. Clark was enjoying this, seeing his cock stroked by his crush and being able to see her massive cleavage swaying as she stroked him. The dream he'd had for years finally had come true. He was fucking a goddess. Her hands moved with grace making Clark come close to releasing. She pulled out for a moment and he released some pre cum in a thick stream on Ms Cain's boobs. "I'm sorry I'll-", he said as he tried to go get something to clean it.

She scooped the bit on her boobs and tasted it. Seeing Clark try to leave she stopped him. "No, no, don't worry. I know what my boobies do to people. This is normal". Though she was beginning to wonder what "normal" was for Clark.

Seeing some pre-cum still on his shaft she licked only a little bit of the side just to clean it off. He liked that though his grunts of joy. She held a hand on the dick as she licked from base to head and the other she squeezed his balls or tried to. She could only handle one as they were too big to hold together. He tasted delicious. Seeing more pre-cum she decided to do it.

He winced as her lips engulfed his cock in her mouth as she pumps the cock a few times before she pulled out to say something. "I'm only doing this to speed up the process",she said. "This has to be removed from your system, this does the job and I'm good at this. Once it's done I'll spit it out."

He winced as her lips engulfed his cock in her mouth. She bobbed her head up and down the length. Her tongue moved all across the cock. Everything was done to it. She'd sucked on dozens of cocks but this one tasted better, cleaner, slicker, juicer. She felt it rise in heat as she licked every crevice. The cum she tasted was fading from her tastes and she wanted more.

Clark was in heaven when he felt; "I'm gonna cum!"

He grabbed her head forcing his full length down her throat as his balls overflowed with cum into Ms Cain's throat, some spilling out onto her shirt. She nearly choked on the cum. As she pulled out from his cock she swallowed, tasting it. "Delicious". They locked eyes after she said that. "I can see plenty of women coming after you with this."

"This was my first time", said Clark.

"Well, I can certainly say that you'll have plenty more before-", She then looked at his cock, as it reinflated but seemed to grow another inch. Clark seemed flustered about it while MsCain smiled.

"Right, I was partially expecting this."

"How? I thought this was a drug for energy like stamina."

"In a way." she looked guilty blushing red. "I was making a drug for sex, to make people last longer. But as you can see it's a little too potent."

Something clicked in Clarks head. "Didn't you get some in yourself today? I don't think you had time to remove it as it was closer to your crotch" She looked at him for a moment before she realized what he wanted.

"You horny one". She chuckled. She was content to simply masterbate or go to a bar and hook up with a random man, but this hung stud knew what she wanted. And she was beginning to feel the effect.

"Right, put on some pants and follow me."

"You sure?"

"Clark it would be a shame to pass up this beautiful cock. I'm gonna teach you sex at my place."

He followed her outside the school to the apartments beside the school only a street or so away. Her ass swayed in the leggings in a near hypnotic manner. He however walked awkwardly still feeling the effect of moving after sitting down and becoming hard seeing her beautiful ass up close.

At the street to cross to her apartment they had to wait at the cross light, standing side by side in the dark. She put her hand down his trouser leg to stroke him briefly. "It's not like before but not enough that I'll leave it alone." She stroked the cock up and down. In return he gave her ass a squeeze with her letting out a gasp.

"Well, it seems you've gotten confident all of a sudden."

He followed her up to the second floor. Ms Cain's ass swayed in tight blue, mesmerizing him all the way. When they got to the door they were pressed up to the door: ms Cain putting in the key excited for the mate to see her home and Clark grinding her ass barely suppressing his desires. He then slid one of his hands down to grope one of her boobs, using two fingers to feel the flow of the skin. "Wait until we're inside before the neighbours come out." Clark stepped back a bit as Luna opened the door. She walked in while he followed a foot behind

Inside the place was mostly white with some flowers and scarcity in the kitchen and sofa room. Some awards hung on the wall for her achievements along with some others like a poster for doctor who. "Wait, you still watch that?"

She turned back with enthusiasm. "Finally. I've had that for years to impress people. Most never notice. You watch it as well."

"No though I will-"

"After this is done I'll sit you down and we'll watch it ok?" This stunned Clark. He'd tried this in other girls and they never talked back to him. Now Ms Cain was talking about her interests with him? Stuff they both liked.

Clark followed her on as he was led to her bedroom.

The red bed sat in the center of the room with a desk in the corner beside a cabinet. The room felt bigger on the inside. Some photos of her on the wall. Some with her and another man on a beach.

"Oh him", she said as she caught Clark looking at it. "That was my boyfriend until he cheated on me. He left me 2 years ago.

He looked at her with hunger in his eyes. She pulled off her top revealing her boobs and muscles. Her nipples were hard and buffed out just right. Clarks cock was straining his trousers. This was what he imagined!

He pulled off his shirt showing his own abs. She seemed to ogle him, surprised by her catch as she'd never taken him to be her type before but was slowly finding he fit all the criteria.

Then they pulled off their trousers. Both saw each other's crotch outlines. From Clark's side a beautiful ass and a prominent camel toe looking wet under red panties. From Ms Cains perspective a massive cock outlining his black boxers on the verge of breaking. He took off the boxers and let the cock swing out and stand facing her, oozing confidence and cum. It looked like it had grown by an inch or so.

She sat on the bed and took off her panties revealing her shaved pussy. "So", she whispered seductively, "what do you want first?" She grabbed her boobs. "Want these?" Then she spread her legs wide, her pussy visible, dripping wet already. "Or this?" Then she turned around her ass high up pointing at him. "Or-".

She did not get to finish as Clark groped her breasts from behind. He squeezed her nipples, kissing her neck passionately. She let out an ecstatic moan. Such a touch for such a youth who was so shy hours ago. His cock rubbed her ass and pussy.

He held her mouth close to his, letting his eyes stare into hers. "We'll do some other stuff first", he said before he lustfully kissed her. She embraced the kiss, their tongues intertwining. He pulled off. "Before I fuck you."

He turned her around so she was lying on the bed. He took a nipple into his mouth, sucking it while he played with the other one. It was lewd but it made Ms Cain ecstatic. She felt his dick rub against her pussy. She needed sex with someone but Clark was going to fuck her.

He moved to the next nipple twirling and twisting it. Her nipples were full out stiff when he was done. Taking the opportunity he nuzzled his head in between her boobs. Rising back up he said,"always wanted to do that".

He rested his legs on her sides and placed his cock between her tits. "Full titty fuck, if you would".

Ms Cain obliged, letting the mountains of boobs engulf the cock rubbing it up and down with her hands. The head still poked through to her as she started sucking his cock.

Again such an enormous thing in front of her, it filled her with so much joy as she sucked in as much as she could feeling the cum dripping out. She felt herself on the verge of cumming when Clark came as well. This time it all came out as she came as well. It blew thick semen all across her face. She scoped up some of it with her finger before tasting it. "Delicious".

It didn't go soft but stayed the same.

Then she had a realization from the horniness. "Wait a moment", she said. She raced to a drawer. Clark stayed behind her seeing in. Dildos (smaller than him), anal beads, a leather cap and what she just had in her hands: a condom.

"This should fit. Put it on while I clean myself". She went off to the bathroom.

He looked at it. Clarke hadn't used a condom before and never noticed the look. A big XXL mark and its texture is like plastic but lubed on the inside. Putting it on was difficult because he had to really force it on and it only got it â…” of the way before he ran out. He heard the bathroom door open again.

When Ms Cain saw that she was enamored and a little scared. This was worn by the biggest guy she'd been with. And this student was bigger? She would have stopped but they were here: she was about to get railed cause she was horny as fuck.

Leaned over the bed she pointed her ass towards him. "You can take your treat." She jiggled her ass letting it slap itself a little.

Clark walked over to position himself. His cock slapped both her holes driving Ms Cain insane with lust.

He seemed to move his cock up and down and around grinding his dick to mark her as his. He stuck his fingers into her pussy feeling the wetness. She moaned as he played with her pussy.

Then he went in. In a moment Ms Cain went from lust to frightened. It went further than the others. Past the naval. She felt a bulge in her belly when she looked down. Clark noticed.

"I can stop if you want."

"No. It's just this", pointing to her belly, "has never happened. Something like this."

"Will I continue?"

"Yes"

Then he started moving out and in. The motions were easy for Clark and simple for her; she had done them before. But never like this. Never something so big stretching everything so much. The head hit her g-spot every time it went in and out. It also moved her insides every time it moved.

"You pleasured me at the start. Now I'll pleasure you more."

She was in ecstasy. Her mind was blank, something that hadn't happened in a long time. She'd dreamed of it but couldn't imagine how better the actual thing would be.

"Oh fuck! Thats fucking good!"

Clark was railing her. It should have felt good. But...

He pulled out. Ms. Cain turned to see why Clark stopped. "I'm gonna take this off. It hurts." Indeed it looked like the condom stretched over his dick nearly bursting from the thrusting.

"That's ok." She looked as he removed the condom.

"I'm at the point in my month where I hopefully won't get pregnant. Though be careful, you could discharge more than normal."

She got up over him pushing him to the bed. This time she straddled him onto the bed on top. "I'll show you how to fuck a woman." She moved the cock under her pussy and went down taking in a fair bit but struggling past the first two inches.

"Your fucking tight teach". He slapped her ass making her squeal. She was making her way down at about her navel, she let her eyes roll back in excitement having the cock so deep in her.

"I'm gonna be real I haven't had a fuck like this in a long time." She moved up and down the length of the cock. Clark felt his dick wrapped around dozens of her lips suck and feeling his cock. "I thought no man could last me this long. I didn't think it would get on such a hung beautiful cock like this!" She could feel it hit her spot every time she went down, from her vagina to the womb.

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