Pulsing

You stepped out of the discreet facility into the late afternoon sun, the vial’s contents still warm in your veins. The drive home felt electric. Every stoplight, every pedestrian—especially the women—seemed to pull at your attention like magnets. By the time you pulled into your apartment complex, a deep, restless heat had settled low in your gut. Your cock twitched half-hard against your thigh the entire ride, and you had to adjust yourself twice just to walk normally.

Inside, you stripped off your shirt immediately. Your reflection in the hallway mirror looked… sharper. Shoulders a fraction broader, skin flushed with fresh vitality. “Day Zero complete,” you muttered, voice already huskier. But the real test was beginning.

Energy crackled through your muscles. You changed into gym shorts and a tank top, grabbed your bag, and headed straight for the apartment complex’s fitness center. The serum promised performance enhancement—let’s see it deliver.

The gym was moderately crowded for early evening. You started with bench presses, loading more weight than usual on instinct. The bar rose smoothly, reps flowing easier than ever. Your pectorals burned in that perfect, productive way, but the pump came faster, fuller. Ten reps turned into fifteen without strain. You racked the bar with a satisfied grunt, blood singing in your ears.

Then you noticed her.

A woman in tight black leggings and a sports bra on the treadmill. Sweat glistened on her olive-toned skin, her dark ponytail swinging as she ran. Her ass—round, firm, jiggling just enough with each stride—looked obscene. Your mouth went dry. She was attractive before, sure, but now? She was devastating. Every curve screamed to be gripped, every bounce of her breasts made your cock thicken visibly in your shorts.

You tried to focus on squats. The movement felt powerful—deeper, stronger—but your eyes kept drifting. Two college-aged girls spotting each other on the cable machines. Their tight tops stretched over perky tits, nipples faintly visible through fabric. A fit MILF in her thirties doing yoga in the corner, her flexible body folding into positions that made you imagine folding her in half on your bed.

Everything was 1000% hotter. Pheromones, enhanced visual processing, dopamine floods—the serum was turning the entire gym into a buffet of fuckable beauty. Your libido surged like a tidal wave. Your cock was fully hard now, tenting obviously. You had to drape a towel over your lap between sets, but even that friction felt teasingly good.

After forty minutes you gave up. Every woman you passed on the way to the locker room left you throbbing. You imagined bending the yoga girl over, burying your face between those cheeks. Pinning the treadmill runner against the wall and pounding her until she screamed. Your balls felt heavy, achy with unspent need.

Back home, you showered, but stroking yourself only made it worse. Three quick, unsatisfying orgasms in the stall and your cock was still semi-erect, veins more pronounced, the head flushed darker. “Fuck… this is insane,” you groaned, already craving more.

Night fell. Confidence bubbled up alongside the hunger. You dressed sharp—fitted black button-up, dark jeans that did little to hide your enhanced bulge—and headed to the popular bar downtown. The serum made you move with purpose. Strangers glanced your way. You felt seen.

The bar pulsed with music and bodies. You ordered a drink and scanned the crowd. First attempt: a cute brunette in a short dress near the dance floor. You approached with a smile, complimenting her moves. She laughed politely but turned back to her friends after one song. No spark.

Second try: a tall redhead grinding with her group. You slid in confidently, hands hovering respectfully at first. She let you dance close, her ass brushing your crotch. The contact sent lightning up your spine. Your hands found her hips, pulling her back against your hardness for a few heated moments. She gasped softly, feeling you, but eventually slipped away with a flirty wink and “Maybe later.”

You danced with two more—each one letting you grind and tease, their bodies responding to your newfound aura. One blonde pressed her tits against your chest, whispering how good you smelled. But none sealed the deal.

Until Sonya.

She was at the bar ordering another martini, late 40s, olive-skinned goddess with thick wavy black hair cascading down her back. Generous curves filled out her deep red dress—wide hips, heavy breasts straining the neckline, thick thighs that promised heaven. Her dark eyes scanned the room with experienced hunger. When they landed on you, she smiled like a predator recognizing worthy prey.

“You move like you know what you’re doing,” she purred as you approached. Her voice was smoky, accented faintly.

“Looking for someone who can keep up,” you replied, voice low. The serum made flirting effortless.

She let you buy her drink. One song turned into three on the dance floor. Sonya danced like sin—pressing her plush ass back against your throbbing cock, rolling her hips in perfect rhythm. You grew bolder, hands sliding down her sides, thumbs brushing the undersides of her heavy tits. She moaned softly into your ear when you ground against her, your hardness nestling between her cheeks through fabric.

“Take me somewhere private,” she whispered hotly after the fourth song, nipping your earlobe. “I need that cock I’ve been teasing.”

Your place was close. The drive was torture—her hand stroking you through your jeans the whole way, cooing at how big and hard you felt. Inside your apartment, clothes hit the floor in a frenzy.

Sonya’s body was a masterpiece of mature beauty. Full, pendulous breasts with dark, stiff nipples. Wide hips, a soft belly that jiggled enticingly, and a shaved pussy already glistening with arousal. She dropped to her knees immediately, freeing your cock.

“Dios mío…” she breathed. Your shaft looked thicker, longer than you remembered—veins bulging, head swollen. She worshipped it with her tongue, sucking sloppily, taking you deep until her throat constricted around you. The serum made you last—thrusting into her warm mouth with controlled power while she gagged and drooled.

You pulled her up, tossed her onto the bed, and devoured her. Your tongue lashed her clit with scientific precision—circling, sucking, flicking—while two fingers curled inside her, finding that spongy spot that made her hips buck. Sonya came hard within minutes, flooding your mouth with sweet, tangy juice, screaming in Spanish.

But you didn’t stop. The serum’s stamina was unreal. You flipped her onto all fours, slamming into her soaked cunt in one thrust. She was tight, velvety, gripping you like a vice. You fucked her with deep, powerful strokes—each one bottoming out, balls slapping her clit. Her ass rippled with every impact. You reached around to rub her clit, making her squirt around your cock on the second orgasm.

“More—harder—you’re ruining me!” she cried.

You flipped positions again, her riding you reverse cowgirl so you could watch that fat ass bounce. Your hands gripped her hips, guiding her down onto every inch. The serum let you thrust up relentlessly, hitting angles that had her convulsing. Third orgasm. Fourth. Her pussy fluttered and clenched, juices running down your balls and soaking the sheets.

You took her missionary, legs over your shoulders, folding her in half. Sweat-slick bodies slapped together. Her tits bounced wildly. You sucked her nipples raw while pounding her into the mattress. The pleasure built like a scientific explosion—every nerve ending alight.

Finally, you roared, burying deep and pumping rope after thick rope of cum into her spasming depths. It felt endless, your balls contracting hard. Sonya milked you dry, her own final climax making her eyes roll back.

You collapsed beside her, both panting. Your cock, even softening, stayed plump and impressive, glistening with her cream. Sonya kissed you lazily, then dressed on shaky legs.

“Best fuck I’ve had in years,” she murmured, kissing your tip one last time before leaving. As the door closed, you saw the trail she left—glistening pussy juices dripping down her thighs onto your floor, a lewd path from bed to exit.

The apartment reeked of sex. Sheets ruined. You lay there, chest heaving, cock still twitching semi-hard against your abs. It definitely looked bigger—longer than your old full erection even now at half-mast, girthier, the head more pronounced.

You grabbed your phone and opened the digital journal app, fingers flying as you logged Day One.

“Day 1 on the serum. Energy through the roof—gym PRs shattered effortlessly. Libido… off the charts. Every woman at the gym looked like walking wet dreams. Went out, brought home Sonya (late 40s, olive skin, incredible curves). Fucked her senseless for over an hour. Made her cum at least five times—mouth, fingers, cock. Filled her up deep. She left dripping everywhere. My cock… visibly enhanced. Still semi-hard. Can’t wait for tomorrow.”

You stared at the screen, one hand absently stroking your thickened length. The serum was working. And you were only getting started.