The Vitamin That Unleashed My Fantasy in the Laboratory

That advertisement appeared before me at the worst and best moment of my life. I had spent weeks sending out résumés, looking through poorly paid vacancies, and wondering whether all those years I had spent racking my brain studying supplement formulation and functional cosmetics had really been worth it. When I saw that a company was looking for a developer for a confidential project, with interviews at a luxury hotel by the sea, I felt a jolt in my stomach.

I didn’t think twice. I prepared my portfolio, changed clothes, and left home with that mixture of nerves and hunger you feel when you sense that a major door might suddenly swing open. The journey seemed short, perhaps because the whole way I could only imagine myself entering somewhere elegant and pretending to have a confidence I didn’t possess.

The hotel was even more ostentatious than the advertisement had promised. Pale marble, silent elevators, expensive perfume in the air, and people moving as though everyone knew exactly what to do with their lives. I was trying not to look out of place when they called me into a private room.

The woman who received me was the first thing that threw my head into disarray that day. She was a little over thirty, with a firm figure, a tailored suit, and a way of looking at me that wasn’t simply that of a recruiter. She introduced herself as Mónica, head of development, and asked me to sit down in a soft yet commanding voice.

While she reviewed my documents, I tried to concentrate on answering smoothly. But it was difficult not to notice her crossed legs, the restrained neckline that nevertheless made it clear she had generous tits, and the way she moved her mouth while reading my credentials. It wasn’t that I identified as a woman who liked women. Until then, at least, I hadn’t. But I wasn’t blind either.

—You have a better profile than I expected —she said, looking up—. And quite a bit more character than you appear to have.

I blushed, though I tried to smile as if the comment hadn’t struck me directly between the legs. We continued talking about processes, formulations, stability, trials, and quality control. I felt more comfortable on that ground, and after a few minutes I no longer seemed like an insecure candidate, but someone who knew what she was talking about.

Then she closed the folder, stood up, and held out her hand.

—You’re hired.

I laughed from sheer relief. I wanted to hug her, but I held myself back. Mónica noticed and smiled with the confidence of someone accustomed to making an impression. She invited me to have a drink in the lobby while they arranged my hiring paperwork, and there, seated across from each other, she began telling me what hadn’t appeared in the advertisement.

The company was developing a new line of supplements. There was one in particular that her team treated almost like a secret project. They called it “X” provisionally and were looking for something unlike anything else on the market. Not a simple stimulant, not just another pill, but a product capable of provoking an immediate and enormous physical response.

—If it works, it’ll change our lives —she told me, holding my gaze—. And I think you can make it happen.

Her confidence aroused me in a strange way. Professionally, of course. Or so I told myself. I accepted without raising a single objection, and when I entered the laboratory they had set up near my neighborhood on Monday, I knew I wasn’t going to let that opportunity pass me by.

The following months were madness. Formulas, blind tests, failures, dosage adjustments, unstable combinations, incomplete records, nights of poor sleep, and mornings with cold coffee in my hands. Mónica spent long hours with me in the laboratory and the adjoining office. Sometimes she patiently corrected a calculation; other times, she stood behind me to look at the screen over my shoulder, so close that I could feel her perfume and my nipples hardened beneath my lab coat.

Nothing happened between us during that time, but the tension was there. In the breaks, in the silences, in the way she held my gaze for a second too long. I pretended it didn’t affect me, although more than once I masturbated at night thinking of her voice giving me orders, her fingers removing my lab coat, her mouth moving down my neck. Just fantasies, I told myself. Just a way to release.

When I finally came up with a promising variation of formula X, I felt capable of crying from exhaustion and pride. I prepared several doses and proposed a controlled internal trial with an adult employee who agreed to participate voluntarily. The chosen subject was Ramiro, the delivery clerk, a sturdy, joking man who was always willing to do favors.

I explained the basics, handed him the capsules, and asked him to pay attention to any reaction. I expected increased energy, a rise in body temperature, perhaps a moderate erectile response. What I didn’t expect was what happened two days later.

Ramiro appeared at the door of my office with a stricken expression. He closed it behind him and stood there, breathing heavily, his fists clenched at his sides. I thought he felt ill and got up at once.

—What happened? —I asked—. Does something hurt? Are you dizzy?

—I don’t know how to say it —he replied hoarsely.

I asked him to calm down and tell me exactly what he had felt. He took two steps toward me, glanced at the door again, and before I could stop him, he unbuttoned his trousers and pulled them down along with his boxers.

I froze.

His cock was completely hard, pointing upward with obscene tension. Thick, veined, flushed, much larger than I would have imagined on him—or on almost any man. It wasn’t a normal erection. It was exaggerated, heavy, aggressive, as if the flesh were at its own limit.

—It won’t go down —he said through clenched teeth—. Since last night. It throbs, it burns, and if I brush against anything I go crazy.

I swallowed. The scientist in me tried to assert itself over my shock. I made him sit down and began asking about dosage, timing, food, hydration, and the intensity of the response. But every time I looked down, that rigid cock drew my attention. It seemed impossible that it could remain so hard without bursting.

I should have acted professionally. I should have called Mónica immediately. I should have requested medical assistance before anything else. Instead, I moved closer. Curiosity, arousal, irresponsibility—I don’t know which weighed more heavily.

—I need to check sensitivity, texture, and response to contact —I murmured, as though that sentence were enough to justify what I was about to do.

Ramiro let out a moan as soon as I nodded toward his crotch. I knelt in front of him, wrapped my hand around the base, and felt a brutal heat, an almost absurd hardness. His whole body trembled. The tip was already wet, and when I ran my thumb over the head, he let out a low curse.

I smelled him first, a thick mixture of clean sweat and male arousal. Then I lowered my head and gave the tip a slow kiss. Just one. My pussy responded at once with a hot throb between my legs.

—Fuck —he whispered.

I licked the head cautiously, as if I really were evaluating a delicate compound. The salty taste and heat of that cock clouded my thoughts more than I wanted to admit. I opened my mouth and took it in slowly, feeling it fill my tongue, my palate, my throat. It was thick. Very thick. I had to breathe through my nose and relax in order to take more.

Ramiro caught my hair without force, as if asking permission and apologizing at the same time. I kept sucking him, moving up and down with a rhythm that grew less and less scientific. One hand at the base, my mouth swallowing saliva, my tongue circling the crown of his cock. Every time I pulled back a little, I saw it shining with my spit, redder, more alive, and I took it back in hungrily.

I began to get genuinely aroused. My panties were already wet. The simple wet sound of my mouth working over that cock was heating me up like an idiot. Ramiro gave broken gasps, but he held on. The formula hadn’t merely triggered his erection; it seemed to turn him into a tense, charged machine, incapable of simply coming.

—I need to fuck you —he suddenly said, looking at me as though saying it hurt him.

I should have said no. Instead, I rose from the floor on shaky knees, locked the door, and let him push me against the desk. He lifted my skirt, yanked my panties aside, and ran two fingers over my drenched pussy.

—Fuck, you’re dripping —he growled.

—Shut up and put it in —I replied, surprised to hear myself speak like that.

He gripped my waist and lifted me just enough to position himself. I felt the tip part me, then that entire cock drove inside me in a single thrust. The impact tore a brutal moan from me. I was left breathless, clinging to the edge of the desk, while he filled me to the hilt with pressure that seemed impossible.

—Fuck, fuck... —I repeated.

Ramiro began fucking me without care, pulling almost all the way out and driving back in with sharp thrusts that made the desk creak. My body bounced against the wood. My pussy was so wet that every thrust sounded slick, filthy, scandalous. I spread my legs wider, offering myself, feeling that enormous cock stretch me inside in a way that was both delicious and abusive.

He held me by the neck without squeezing too hard and forced me to look at him.

—You made me like this.

—Then use me —I told him, almost without thinking—. I want to know what your body does.

The words aroused him even more. He turned me around, bent me over the desk, and pulled my lab coat and blouse aside enough to free my tits. He kneaded them roughly while drilling me from behind. I moaned with my face pressed to my notes, feeling my hard nipples brush the paper and his cock plunging into me at a savage pace.

He brought one hand to my pussy and began rubbing my clitoris with two thick fingers, smearing everything with my own juices. It took almost no time for me to come. The orgasm burst inside me amid a muffled cry. I trembled all over, squeezing his cock with spasms, and he kept fucking me through the climax as if he needed to wring even more out of it.

I don’t know how long we stayed like that. We changed positions several times. Sitting on the edge of the desk with my legs spread, riding him in the laboratory chair, on my knees on the floor while he took me by pulling my hair. Every time I thought I couldn’t take any more, he remained hard, just as enormous, just as urgent.

He made me kneel again so he could come in my mouth, but he couldn’t. I felt him throb, grow even tenser, and still nothing came out. Then he lifted me and drove his cock into me again, all the way to the bottom. I was beside myself, dripping down my thighs, my pussy swollen and happy to keep receiving him.

When he finally eased his pace a little, I pushed him away, gasping, and collapsed into the chair. My face was burning and my legs were trembling. Ramiro was still almost as hard as before.

—I’m going to call Mónica —I said at last—. She has to see this.

Mónica arrived a few minutes later, serious at first and incredulous when I explained what had happened. Her gaze moved from me to Ramiro, then to the enormous cock still standing erect between his legs. The expression of control she always wore cracked for the first time.

—This can’t be real.

—Touch it —I told her.

She hesitated for barely a second. Then she approached and closed her hand around the base. Her lips parted slightly when she felt the hardness. I watched her breathing quicken. Ramiro growled. Mónica raised her eyes to me, and there was no longer merely scientific curiosity in them. There was desire. A lot of it.

—Put all your doubts to rest —I murmured.

This time, she was the one who knelt. Seeing my boss, immaculate in her suit, sucking an employee’s cock in the middle of my office soaked me all over again instantly. She did it well, running her tongue slowly over the head before swallowing it calmly. Ramiro held her jaw and she let him, moaning around his cock.

I moved behind her, pushed her hair aside, and began kissing her neck. Mónica let out a hoarse sound. My hands traveled down her waist, lifted her skirt, and found her panties completely wet. I pulled them aside and thrust two fingers into her. She arched without stopping her sucking.

—So it does turn you on —I whispered in her ear.

She pulled the cock from her mouth to answer:

—You turn me on. And that damn formula.

I turned her toward me and kissed her for the first time. It was a dirty, urgent kiss, tasting of saliva and cock. Our tongues tangled while my fingers opened her from within and she squeezed one of my tits through my clothes. Ramiro, already out of patience, separated us and pushed us toward the small sofa beside the window.

Mónica fell first and I landed on top of her. Ramiro spread both our legs and positioned himself between us. He made me lick her pussy while he put his cock inside her. Mónica screamed as soon as she received him. I felt her against my mouth, hot, slippery, trembling each time he thrust into her. I sucked her clitoris, slipped my tongue inside her, and listened to her curse and beg for more.

—Don’t stop... don’t stop, you bitch... —she panted, clutching my hair.

Ramiro fucked her with precise violence, as if his body dictated a rhythm impossible to halt. I ate her while slipping my hand between my legs and masturbating, getting wetter and wetter. The sofa banged against the wall. Mónica’s moans mingled with my muffled sounds and his deep grunts.

When she came, I felt her tighten against my mouth. She climaxed, shaking, her thighs closing on either side of my face, and still Ramiro didn’t stop. He pulled out of her and grabbed me by the waist so I could sit backward on his cock. I lowered myself slowly, enjoying the thickness again, and he spread my buttocks with his hands to watch me swallow him.

Mónica sat up, unbuttoned my blouse completely, and began sucking my nipples while I rode him. The sight drove me crazy: my boss between my tits, her mouth on my skin, and that enormous cock entering and leaving my pussy from below. I began moving faster, bouncing on him, until I felt another orgasm rising like an electric shock.

—I’m going to come —I warned, almost shouting.

—Do it —Mónica ordered—. I want to watch.

I came trembling on Ramiro’s cock, squeezing him so tightly that at last I felt him give way. His entire body tensed, his fingers dug into my hips, and he released a brutal load inside me. I felt it hot, thick, and long, filling me in pulses while he remained buried to the hilt. I moaned in pure satisfaction when I felt some of it run down my thighs as I lifted myself slightly.

The three of us remained there panting, disheveled and filthy, the laboratory smelling of sex and sweat.

***

After that, the company stopped being a normal company. We confirmed that the altered formula caused enormous erections, extraordinary stamina, and a savage sexual response. The problem was that the tests could no longer be carried out with mere technical detachment, because Mónica and I had become part of the validation procedure.

I’m not going to pretend it was difficult for me to accept.

The following sessions were planned, but no less intense for that. We had several adult volunteers, all informed, all eager to try the compound. Mónica and I prepared the doses, measured times, recorded reactions... and afterward ended up spread-legged, receiving a practical demonstration of each result.

One night, four key partners arrived to review progress in private. It was supposed to be a technical meeting in a reserved suite. It began that way, with charts, projections, and market questions. It ended when one of them, already under the formula’s effects, adjusted his trousers with an expression of pure need and Mónica looked at him as though she had been waiting for hours.

—There’s a very clear way to demonstrate efficacy —she said, without taking her eyes off me.

The suite had a large sitting room, a bar, and two connected bedrooms. They closed the curtains. I was nervous, aroused, and far too aware that this had become much more than a simple office fling. But when Mónica kissed me in front of everyone and began lowering my dress, I thought about it less.

They used both of us without gentleness. First on our knees, sucking cocks side by side, spitting saliva, switching mouths, swallowing hard heads while the men held our hair and made us open our throats wider. Hearing Mónica moan with a full cock in her mouth was one of the most obscene and exciting things I had ever seen.

Then they laid me on the bed and spread my legs between two of them. One fucked my pussy while another put his cock in my mouth, forcing me to endure the weight and rhythm at the same time. Beside me, Mónica was being penetrated from behind while sucking a third man’s cock and masturbating so she could come faster. The room was chaos—gasps, skin slapping, clipped commands, and moans of filthy pleasure.

They made me turn over, gripped my hips, and fucked me until I was speechless. One pushed fingers into my ass while the other kept entering my pussy, and when I finally agreed to open myself wider, they covered me well with lubricant and slowly worked the tip inside until I was moaning from sheer excess. It hurt just enough at first; afterward, all that remained was the full, brutal sensation of being used completely.

Mónica came on top of me, straddling my face while one of the men penetrated her. I licked her ass and her wet pussy, feeling her move over my tongue as she took thrusts from behind. She came screaming my name. I came almost at the same time when one cock filled me again and another sprayed his load across my tits.

That night I understood that the formula hadn’t merely created a product. It had uncovered something I had carried inside me and never allowed myself to explore. My desire wasn’t orderly, proper, or clean. It was voracious. And for the first time, I was letting myself surrender to it without shame.

***

Several weeks later, the compound already had a provisional commercial name and a huge future ahead of it. Mónica confessed that the executives wanted to name it after a variation of my name, because I had found the decisive adjustment to the formula. We laughed at the idea, sitting in her office with two glasses in our hands and the memory of far too many private sessions still clinging to our skin.

—You’ve earned it —she told me.

—The name or the fucking? —I asked.

—Both.

She set down her glass, came over to me, and kissed me slowly. There was no longer any unresolved tension between us. There was familiarity, desire, and a strange intimacy born among tests, orgasms, and secrets. She sat me on her desk, opened my blouse, and knelt without any hurry.

Seeing her like that still affected me. Her tongue traveled up my inner thigh to my pussy and opened me with a satisfied moan when she felt how wet I was. She licked me slowly, deeply, knowing exactly how to make me tremble. I held her hair, spreading my legs wider, letting her bury her tongue and then one finger, then two, while she sucked my clitoris with a firmness that slowly unraveled me.

—You always get this wet when I talk about the product —she murmured against my skin.

—I always get this wet when you eat my pussy.

She smiled without stopping and continued until she made me come on her mouth. Then she stood, barely wiped herself with her thumb, and made me taste it. The gesture aroused me even more. I half-undressed her, pushed her skirt up to her waist, pulled down her panties, and bent her over the desk where we had so often worked for real and for show.

I opened her with my fingers and began fucking her with a dildo we kept, almost as a matter of routine, in a drawer in the office. Each thrust tore a deep moan from her. She braced her forearms on the desk and moved her ass to take me better. I alternated the toy with my fingers on her clitoris, enjoying the sight of her losing the composure she wore like armor everywhere else.

—Harder —she begged—. I want to finish completely wrecked.

I gave it to her. I fucked her until she stopped speaking in sentences and could only produce broken sounds. When she came, her legs trembled and I had to hold her by the waist. Then she made me lower myself to the floor, put me on my knees, and sat on the edge of the desk so I could lick her again, this time drinking her orgasm until she was sensitive and giggling.

We ended up embracing, breathing slowly, as if suddenly the laboratory, the office, and the entire project were merely the unlikely setting where we had discovered our way of desiring each other.

The product launch arrived with private celebrations, closed-door negotiations, and more than one long night. Not everything that happened afterward deserves to be told, and not everything needs a scientific record. What I do know is this: that vacancy changed my career, my body, and my understanding of desire.

I entered that hotel looking for a job. I left with a boss who became my accomplice, a formula that unleashed fantasies I hadn’t even known I possessed, and one simple, wet, brutal certainty: sometimes the true chemical reaction doesn’t happen inside a capsule, but between the legs.