Cover of The Lust Formula

The Lust Formula

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When college sophomore Sherman, a physics nerd, accidentally downs a vial of experimental pheromone enhancer in the lab, he expects nothing but a stomachache. Instead, he discovers a bizarre side effect: the moment he gets hard for someone, they become helplessly, ravenously attracted to him—no red flags, no boundaries. Now, with the hottest TA, the hot calculus instructor, and a gaggle of sorority sisters all vying for his attention, Sherman realizes he's stumbled onto the ultimate gold mine. He plans to get every last ounce of gold pleasure he can get out of it!

Chapter 2: Grad Student Seduction

The library carrel felt like a cage. Sherman stared at the dense lines of his quantum mechanics textbook, but the symbols swam and blurred into memories of Tara’s frenzied eyes, the creak of the bedsprings, the hollow confusion on her face after. He had spent a week in a state of hyper-awareness, walking through campus as if he were carrying a loaded weapon in his pants. The power was a live wire coiled in his gut, humming, waiting for a target.

He needed a better lab. A controlled environment. The party had been useful, but messy. Too many variables. He needed isolation. Precision.

His thoughts drifted to the third floor of the Physics building, to the graduate student offices that smelled of ozone and stale anxiety. To Tanya Vasquez.

She was his TA for Intro to Electromagnetism. Twenty-three, maybe. Curly auburn hair she usually tied back in a frantic, escaping bun. Freckles across her nose. She wore big, woolly sweaters that swallowed her shape, and she spoke in lectures with a soft, precise voice that often trailed off, as if doubting her own authority. When she handed back his last quiz, her fingers had brushed his, and she’d flinched, muttering a quick “sorry” without meeting his eyes. She was shy. Reserved. A closed system.

Perfect.

He packed his bag. It was a Thursday evening, long after normal office hours. The hallway on the third floor was empty, lit by the grim, flickering fluorescence of budget bulbs. He heard the soft scratch of a pen from behind door 312.

He knocked.

A muffled, “It’s open,” came through the wood.

He entered. The office was a warzone of academia. Sticky notes bloomed across every surface like fungal growth. Half-empty coffee cups formed a precarious archipelago on the desk. The whiteboard was a frantic tapestry of equations that dissolved into question marks and angry erasure smudges. In the corner, a microwave sat with its door slightly ajar, emitting the ghostly scent of burnt popcorn from some long-forgotten experiment.

Tanya sat hunched over a stack of undergraduate lab reports, her curly hair escaping its bun in damp tendrils around her face. She wore one of her signature oversized cardigans, the sleeve cuffs stretched from nervous tugging. She didn’t look up.

“Office hours are Wednesday,” she said, her voice tired. “But if it’s quick, I can…”

Her words died as she glanced up. She saw him, recognized him, and a faint, polite smile touched her lips. “Sherman. The Gauss’s Law report? It’s not due until…”

He closed the door behind him. The click of the lock was loud in the small room.

Tanya’s pen stopped. Her eyes, a warm hazel, flickered to the locked door, then back to his face. A faint line appeared between her brows. “What are you…?”

Sherman didn’t answer. He leaned back against the door, letting his bag drop to the floor with a thud. He looked at her—really looked. Past the baggy sweater, to the curve of her shoulder beneath the wool. The fullness of her lower lip, bitten raw from concentration. The way a single freckle sat just at the corner of her mouth. He felt the familiar, deliberate shift inside himself. He focused on the quiet heat of her, the intelligence in her eyes, the hidden shape of her. He imagined the feel of that curly hair wrapped around his fist. The sound of her precise voice breaking into a sob.

The bolt fired. A clean, hot surge of targeted desire.

Tanya Vasquez jerked in her chair as if shocked. Her pen clattered to the desk. Her eyes, wide and suddenly glassy, fixed on him. The polite confusion evaporated, replaced by a dawning, desperate hunger that washed over her features in a visible wave.

“Oh,” she breathed. The word was soft, shattered.

“You’re working late,” Sherman said, his voice calm. Testing.

“I… the reports…” She stood up, the motion unsteady. Her chair wheels squealed against the linoleum. She took a step toward him, then another, her movements dreamlike. The oversized sweater hung on her, but the way she moved now suggested the body beneath it was awake, taut. “It’s so stupid. It’s all so stupid. These… these equations.” She gestured vaguely at the whiteboard, her eyes never leaving his face. “They don’t mean anything.”

She was inches from him now. He could smell her—coffee, chalk dust, a faint, clean scent of lavender soap. Her gaze was locked on his mouth.

“What does mean something?” he asked.

“This,” she whispered. Her hands came up, trembling, and rested on his chest. She leaned in, her body pressing against his. Through the layers of their clothes, he could feel the heat radiating from her. “You. I’ve been… thinking. I shouldn’t think these things.”

“What things?”

She shook her head, a frantic little motion. Her cheeks were flushed. “Bad things. Dirty things. During lecture, I’d watch you… your hands… and I’d imagine…” She swallowed hard. “I’d get so wet. Just from watching you write on your notebook. It’s so fucked up.”

Her confession, pulled from some deep, suppressed place, was more arousing than any practiced seduction. Sherman felt himself hardening against her hip.

“Show me,” he said, his voice low.

A whimper escaped her throat. She dropped to her knees on the hard linoleum floor. Her hands fumbled at his belt, her fingers clumsy with urgency. The buckle opened. The button of his jeans popped. She yanked the zipper down, the sound harsh in the quiet room. She pulled his jeans and boxers to his thighs, freeing his cock, which stood already thick and flushed.

She stared at it for a second, her lips parted, her breath coming in quick puffs. “It’s beautiful,” she murmured, almost to herself. Then she leaned forward and took him into her mouth.

It was nothing like Tara’s skilled, performative blowjob. This was pure, sloppy need. She enveloped him, her mouth hot and wet, but she had no rhythm. She sucked greedily, gagging almost immediately as she tried to take him deeper. She pulled back, coughing, a string of saliva connecting her lip to his shaft. “Sorry,” she gasped, her eyes watering. “I’m sorry, I just want it so much.”

“It’s okay,” Sherman said, his hand settling on the back of her head. “Take it.”

She moaned at his touch and dove back down. This time, she used her hand at the base, working him in tandem with her mouth. The sounds were obscenely loud—wet sucks, gags, her choked breaths through her nose. Her other hand scrabbled at her own body, slipping under the massive sweater, hiking up her skirt. He looked down and saw her fingers vanish into her underwear, saw the frantic movement of her wrist.

“Fuck,” she panted, pulling off him again, her chin glossy with spit. “I’m so close. Just from sucking you. I’m gonna come. Can I come? Please?”

“Do it,” he growled.

Her eyes rolled back. Her body stiffened, her hips bucking against her own hand. A long, ragged cry was torn from her, muffled by his flesh. She convulsed on her knees, her mouth slack around him, her whole body trembling through the orgasm. When it passed, she slumped forward, resting her forehead against his stomach, breathing hard.

She looked up, her expression shattered and adoring. “I need you inside me. Now. Please, Sherman. I’ll do anything. I’ve never… I’ve wanted to try things. Let me be your slut. Just for tonight.”

He pulled her to her feet. Her legs were wobbly. He turned her, bending her over the cluttered desk. Sticky notes clung to her sweater. He shoved a stack of lab reports to the floor. They fluttered like dying birds.

He pushed her skirt up around her waist, tugged her plain cotton panties down to her knees. She was soaked, her skin slick and gleaming in the ugly fluorescent light. He positioned himself at her entrance, the head of his cock nudging against her.

“Tell me what you’ve wanted to try,” he said, gripping her hips.

“Everything,” she sobbed, pushing back against him. “Hard. Do it hard. Call me names. I want to feel it tomorrow.”

He drove into her in one brutal thrust. She screamed, a raw, unpracticed sound that echoed off the cinderblock walls. She was incredibly tight, the clenching aftershocks of her own orgasm still gripping him.

He fucked her with a punishing, mechanical rhythm, the desk scraping across the floor with each impact. A coffee cup tipped over, brown liquid spilling across an open textbook. He didn’t care.

“You’re such a fucking cliché,” he grunted, slamming into her. “The shy TA. All this time, you were just a desperate little cunt.”

“Yes!” she wailed, her face pressed against a graph paper. “I am! I’m your desperate little cunt! Use me! Fuck my brains out!”

He wrapped a hand in her curls and pulled her head back, arching her spine. The new angle made her gasp. He pounded into her, his balls slapping against her skin. The room filled with the sounds of their collision: flesh on flesh, the rattling desk, her increasingly incoherent babble.

“I’m gonna come again, I’m gonna come, don’t stop, please don’t stop, fill me up, breed me right here on the desk—”

Her second climax hit her like a seizure. Her whole body locked, her inner muscles milking him in violent, rhythmic pulses. It tipped him over the edge. With a final, deep thrust, he came, spilling into her with a guttural shout, his vision whiting out at the edges.

He stayed buried in her, hunched over her back, gasping for air. The flickering desk lamp cast jumping shadows over the equations on the wall.

Slowly, the fever broke. He felt her awareness return in the gradual loosening of her muscles, the change in her breathing. The desperate, chanting slut vanished.

He pulled out. A wet, messy sound. He tucked himself back into his jeans, zipped up.

Tanya slowly straightened. She pulled her skirt down, her movements clumsy. She didn’t look at him. She stared at the spilled coffee seeping into the textbook, at the scattered papers on the floor. She touched the back of her head where he’d pulled her hair.

When she finally turned, her face was a mask of horror. Her freckles stood out against pale skin. Her lips were swollen. She wrapped her arms around herself, shrinking back into her oversized sweater.

“What… what did we just do?” Her voice was her own again, soft and trembling, but now laced with a deep, seismic shame.

“You asked me to,” Sherman said flatly, picking up his bag.

“I have a boyfriend,” she whispered. “We… we’re talking about moving in together. He’s a chemist. He’s kind.” She looked at the locked door, then at the mess on her desk. A tear traced through the sweat on her temple. “I don’t… I don’t talk like that. I’ve never said those words in my life.”

Sherman unlocked the door. He paused, looking back at her. She was a collapsed star, all that fierce, kinky energy gone inward, crushing her.

“You should clean up,” he said. “The reports are a mess.”

He walked out, leaving her standing amidst the ruin of her office and her dignity. The hallway was still empty. As he walked toward the stairwell, his phone buzzed in his pocket.

He pulled it out. A text from an unknown number. He opened it.

It was a photo. A close-up, blurry but unmistakable. The auburn curls between her thighs, glistening. The text below read: Can’t stop thinking about your cock. I’m so empty. Come back.

He stared at it. The power didn’t just break at climax. It left… residue. A compulsive, addictive afterimage. Tara had been confused. Tanya was haunted, texting him filth from the wreckage of her own mind.

He saved the number under TA - Vasquez. He didn’t delete the photo.

A cold, scholarly satisfaction settled over him. The experiment was a success. New data: the effect could induce profound, lasting behavioral changes, a crack in the psyche that kept leaking.

He stepped out into the cold night. The air felt clean. He had a lab now. He had a subject. And he was just beginning to understand the variables.

His phone buzzed again. Another photo. This one of her mouth, lips parted, tongue out.

Sherman smiled, put his phone away, and walked on, the power in his blood humming a quiet, triumphant tune.

Sherman smiled, put his phone away, and walked on, the power in his blood humming a quiet, triumphant tune. Tanya’s text was a digital ghost, a phantom limb of desire twitching after the amputation. He slept deeply that night, the static taste a distant memory beneath the sharper flavors of conquest. The morning arrived clear and cold, his mind already scheming, mapping the day’s potential energy onto a mental grid.

He skipped his morning lecture. The system was a joke. He was the system now. He showered, the hot water sluicing over him, and considered his next variable. Controlled, but elevated. A true authority figure. His thoughts, slippery and deliberate, settled on Dr. Evelyn Cross. Calculus II. Twenty-six. A cutting silhouette in tailored blazers, her black hair a severe waterfall, her green eyes missing nothing. She’d once chastised him for a missing derivative, her voice a scalpel. He’d flushed with humiliation then. Now, the memory kindled something else.

Her office was in the newer Eaton Hall, a world away from the sticky chaos of the grad student offices. The hallway here was quiet, carpeted, smelling of disinfectant and ambition. Her door, polished oak, was shut. A small, discreet placard read Dr. E. Cross. He listened. No voices inside. He knocked, twice, firm.

“Enter.”

Her voice was exactly as he remembered. Cool. Expecting a problem set. He opened the door.

She sat behind a sleek, organized desk, her posture perfect. She was grading, a silver pen in her hand. She glanced up, her green eyes flicking over him with impersonal recognition. “Mister… Pullman. I don’t have scheduled hours until three.” She didn’t smile. The morning light from the window caught the edge of her razor-sharp cheekbone.

“It’s not about calculus,” Sherman said, closing the door behind him. The lock engaged with a soft, precise click.

Her pen paused. Her gaze sharpened, not with desire, but with professional irritation. “Then I suggest you make an appointment with your advisor. This is hardly appropri—”

He didn’t let her finish. He leaned against the door, blocking it, and let his eyes travel over her. He dismantled her. The elegant line of her neck, the slight part of her lips, the way her blazer pulled taut across her shoulders. He thought of her on her knees. He thought of that sharp voice begging. He focused on the latent power in her slim frame, the intelligence he wanted to see shatter. He ignited the spark. The bolt was a clean, white-hot wire, straight from his core to hers.

Dr. Evelyn Cross’s breath hitched. The pen slipped from her fingers, rolling soundlessly across the desk. Her rigid posture dissolved, a marionette with its strings cut. She leaned back in her chair, a slow, languid motion utterly foreign to her. Her eyes, wide and dilated, lost their focused edge, going soft and depthless.

“You,” she breathed. The word was a revelation.

“Me,” Sherman agreed, walking forward. The fear was gone. This was a procedure.

She stood, her movements fluid, almost drunken. She came around the desk, her hips swaying. The professional distance evaporated. She stopped inches from him, her head tilting back to meet his gaze. Her scent, something crisp and botanical, flooded his senses. “I’ve been… thinking about you.” Her voice was a husky whisper, all authority sanded away. “During my lectures. I’d watch you struggle with the integrals and imagine… guiding you. Other ways.”

“Show me,” he said, his voice flat.

A shudder wracked her. She dropped to her knees on the industrial carpet, her hands already at his belt. Her fingers, usually so precise on a whiteboard, fumbled in their hurry. She got his jeans open, pulled his cock free, and stared at it with a kind of awful reverence. “I’m not… I haven’t…” She didn’t finish. She took him into her mouth.

It was inexperienced, messy. She gagged immediately, pulling off with a wet cough, her eyes watering. “I’m sorry, Professor,” she gasped, the title slipping out unbidden, warped.

“Again,” he commanded.

She obeyed, her mouth a hot, desperate suction. She tried to use her tongue, the motions theoretical, clumsy. He looked down at the top of her sleek head, at the perfect part in her black hair, bobbing awkwardly. The obscenity of it was absolute. He tangled his hand in her hair, not gently, and guided her pace. She moaned around him, the vibration traveling straight to his groin.

“Enough,” he said, pulling her head back by her hair. A strand of saliva connected her swollen lip to his glistening shaft. “Stand up.Turn around. Bend over the desk.”

She scrambled to comply, her breathing ragged. She turned, bent forward, planting her palms flat on her neat stacks of papers. He pushed her pencil skirt up to her waist, revealing plain, practical white cotton panties. He hooked his fingers in the waistband and yanked them down to her knees.

She was already wet, her skin slick. He positioned himself, the head of his cock nudging against her entrance. She pushed back, a tiny, frantic movement.

“Please,” she whimpered, her forehead resting on a student’s midterm. “Please, Professor. I need you to fuck me. I’ve been so empty. All these numbers… they’re nothing.”

He drove into her. She was tight, a vice of clenched anxiety. She cried out, a sharp, broken sound that echoed off the clean walls. He didn’t wait for her to adjust. He set a brutal, piston-like rhythm, fucking her over her own orderly desk. A stack of handouts cascaded to the floor.

“You’re a quick study, Doctor,” he grunted, each thrust jolting her forward. “But this is the only equation that matters now.”

“Yes!” she sobbed, her composure shattered. “God, yes! It’s the only thing! Fuck me, ruin me, I don’t care!” Her words dissolved into incoherent sounds, gasps and choked cries that synced with his driving hips. He gripped her hipbone with one hand, the other fisted in her hair, holding her down. The desk shuddered, its metal legs screeching faintly against the floor.

Her climax took her violently. She screamed, her body seizing, her internal muscles clamping around him in frantic, rhythmic pulses. The sheer force of her surrender, the total abandonment of her prized control, triggered his own. With a final, deep plunge, he came, pumping into her, his own groan muffled against the back of her blazer.

He stayed there, buried inside her, for a long moment. The only sounds were their ragged breathing and the distant hum of the building’s HVAC. He slowly pulled out. A wet, warm trickle followed.

He straightened his clothes. She remained bent over the desk, trembling, her skirt still rucked up, her panties around her knees. A faint, dark smear marred the paper beneath her cheek.

Sherman picked up his bag. He was at the door when her voice stopped him, thin and cracked.

“What… what did we do?”

He didn’t turn. “Office hours are at three.”

He unlocked the door and stepped out into the bright, sane hallway, closing it softly on the ruin of her.

He unlocked the door and stepped out into the bright, sane hallway, closing it softly on the ruin of her. He walked, the taste of ozone and her botanical shampoo a phantom on his tongue. His hands felt clean, but he smelled her on his fingers—a metallic tang beneath the crisp scent.

He didn’t go home. He went to the campus coffee shop, the one with the grungy barista who’d only ever sparked a flicker. He ordered a black coffee and sat at a small table by the window, watching the ordinary world move past. Students laughed, scuffed through fallen leaves, argued about Heidegger. Their noise was a flat, dimensionless backdrop to the sharp, private symphony in his head. He replayed the shudder of Dr. Cross’s climax, the way her intelligent voice had cracked into a sob. It was better than any grade.

His phone vibrated against the formica table. Another photo from Tanya. Her mouth again, this time with two fingers pressed against her tongue. The text: I can still taste you. I’m in the library stacks. Third floor. History of Physics. No one comes here.

He didn’t reply. He sipped his coffee. Let her wait. Let her ache. The power wasn’t just in the act; it was in the aftermath, in the hollow craving he left behind. He was mapping the residue.

The bell on the coffee shop door jingled. A cold draft swirled in, carrying the smell of dry leaves and frost.

“Sherman?”

The voice was different. Not soft like Tanya’s, not sharp like Evelyn’s. It was husky, raw at the edges. He knew it.

He turned.

Tara stood there, framed in the doorway. The sorority girl. Her sharp bob was messy, as if she’d been running her hands through it. She wore expensive-looking leggings and a puffy vest, but no makeup. Dark circles smudged beneath her eyes, which were fixed on him with a terrifying intensity. The cool, bored predator from the party was gone. This was something feral, unraveled.

“You,” she said. The word wasn’t a greeting. It was an accusation and a plea welded together.

The barista glanced over, sensing the change in atmospheric pressure. Sherman put his coffee down slowly. “Tara.”

“I looked up your name in the student directory,” she said, stepping closer. She didn’t bother with preamble. “I’ve been walking around for a week. I can’t sleep. I can’t think. I see your face when I close my eyes. I smell you on my skin, but I shower three times a day.” Her words tumbled out, a rushed, shaky confession. “What did you do to me?”

“I didn’t do anything,” Sherman said, his voice calm. He felt the wire inside him humming, ready. “You brought me upstairs.”

“Don’t.” She shook her head, a frantic motion. “Don’t do that. It wasn’t me. It was like I was possessed. I’ve never… I don’t do that.” She gripped the back of the empty chair opposite him, her knuckles white. “But now… now I can’t stop thinking about it. About you. About how you felt. I need…”

“You need what?” he prompted, a cold curiosity unfurling in his chest.

“I need you to fuck me again.” She said it loudly. A couple at the next table flinched, pretended not to hear. Her face was flushed, not with shame, but with a desperate, hot need. “Right now. I don’t care where. My car is out back. Please.”

This was new. Tanya was sending texts from a place of shameful compulsion. Evelyn would likely drown in professional horror. But Tara… Tara had metabolized the residue into a pure, driving addiction. She had hunted him. He stood up, leaving half his coffee. “Alright.”

Her car was a small, sleek convertible, absurdly impractical for the climate. The backseat was a cluttered mess of gym bags and shopping totes. She pushed it all onto the floor with a violent sweep of her arm as soon as he closed the passenger door. The windows fogged almost immediately.

“Here, now,” she demanded, her breath pluming in the cold air inside the car. She was already pulling her leggings down her hips, the elastic snapping against her skin. She wasn’t wearing underwear. “I’ve been wet for days thinking about this. I’ve tried everything. My vibrator, my fingers… it’s just noise. It’s not you.”

Sherman unzipped his jeans, freeing his cock. The cold air made him gasp, but she was on him before he could say a word. She climbed over the center console, awkward and graceful in her desperation, and straddled his lap in the passenger seat. Her puffy vest was in the way; she ripped the zipper down and shoved it off her shoulders. Her sweater followed. She sat bare-chested in the cold car, her nipples hard, her eyes wild.

She reached between them, guiding him inside her with a practiced, frantic certainty that was nothing like the clumsy office encounters. She was already soaked, slippery and hot. She sank down onto him in one smooth, deep stroke, taking him all, until her ass met his thighs.

A guttural, broken sound tore from her throat. “Oh, god. Yes. That’s it. That’s what I needed.”

Then she moved. This wasn’t the passive, shattered receiving of Dr.Cross. This was deliberate, athletic, furious. She braced her hands on his shoulders and the headrest behind him and rode him like she was trying to break a wild horse. Her hips pistoned, driving him up into her with a brutal, grinding rhythm. The car rocked on its suspension.

“Fuck, you’re so deep,” she moaned, her head falling back. “I can feel you in my stomach. I dreamed about this. I dreamed about your cock wrecking me.”

She leaned forward, biting his shoulder through his shirt, her teeth sharp. The pain was bright and electric. He grabbed her hips, his fingers digging into the flesh, trying to match her pace, to somehow steer this frenzy. But she was in control of the motion, a engine of pure need. Her breasts heaved in his face; he caught a nipple in his mouth, sucking hard. She screamed, her rhythm stuttering for a second before becoming even more frantic.

“Harder,” she gasped. “Don’t be gentle. I’m not a fucking princess. Use me. Fuck up into me, you bastard.”

He obliged, driving upwards to meet her downward slams. The sound of their collision was a wet, meaty slap that filled the fogged car. The windows were completely opaque now, sealing them in a hot, private hell of sweat and sex and her choked, sobbing curses.

“I’m coming,” she shrieked, her body clamping around him like a vice. “I’m coming, don’t you dare stop, make me come!” Her orgasm was violent, a series of convulsions that milked him relentlessly. It dragged his own release out of him. He erupted inside her with a shout, his vision tunneling to the sight of her frenzied, ecstatic face above him.

She collapsed against his chest, both of them slick with sweat, breathing in ragged, agonized gulps. The car creaked softly as it settled.

For a long time, there was only the sound of their breathing. The fever did not break. She nuzzled into his neck, her mouth against his skin. “It’s still not enough,” she whispered, her voice hoarse. “I still want more. How is that possible?”

Slowly, she pushed herself up, still impaled on him. She looked into his eyes, and there was no confusion, no shame. Only a dark, unwavering hunger. “I dumped him,” she said, as casually as mentioning the weather.

“Who?”

“Mark. My law school boyfriend.” A faint, contemptuous smile touched her lips. “I saw him last weekend. He tried to touch me. I couldn’t stand it. His hands felt like… nothing. Like dead fish. I told him he couldn’t satisfy me. That I’d found something real.” She leaned in, her breath hot on his ear. “You. You’re real. This is real. This feeling. It’s the only thing that’s ever been real.”

She shifted, grinding against him, and he felt himself stir inside her again. The residue wasn’t fading. It had mutated. It had found a permanent home.

“I’m not letting you go,” Tara murmured, beginning to move again, a slow, possessive undulation. “You’re mine now. We’re going to do this until we both break.”

Outside, a student walked past the fogged windows, laughing on a phone, utterly unaware of the covenant being sealed in the steamy car. Sherman looked over Tara’s shoulder at the opaque glass, at their hidden world, and he knew the experiment had entered a new, uncontrolled phase. The variable had become self-aware. It was clinging to him. And part of him, the cold, analytical part, was thrilled.

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