Came for the money, stayed for the science

**This story contains: huge cocks, cock growth, huge muscles, muscle growth, large insertions, excessive cum, cock vore, drugs, hardcore sex and probably some other great stuff.

“$500 for just 2 hours of your time! Help us test our new fertility pill and get paid now!” said the colorful flyer Derek was staring at as he stood in the waiting room of one of the testing centers of the biggest pharmaceutical company in the entire country. “That’s a lot of money for just getting hard once! Hell, I’ll get hard for however long they want me to for that kind of cash!” he said to himself with a smirk. Derek was always a big guy. His incredible size was always the center of attention for as long as he could remember, no matter where he went or who he met. His muscle mass took years to properly develop and define, but the bulge between his legs completely stole the show every time. That huge monster in his pants always received constant stares from men and women alike. Contrary to popular belief, he never touched steroids and never used any kind of penis enhancers. He had his own way of developing his body, apart from regular exercise and proper nutrition, an ability which he discovered at a pretty young age. But given the fact that it wasn’t the most ethical or socially acceptable thing in the world, he decided to keep it to himself. Finally, a beautiful lady appeared in front of him and asked him to follow her to the testing chamber. She escorted him to a medium-sized room that was completely empty except for a couch, a table with a few red pills on a white plate and 2 large windows that the scientists would use for observation. As soon as he got in, a female voice started speaking through a speaker. She explained that he only needed to get naked and take one pill, then simply sit down on the couch for 2 hours while they observe the evolution of his erection. Being the cocky bastard he was and seeing that the scientists were mostly females, Derek decided to give them a nice show too.

Dropping heavily on the couch, the big man grabbed one pill and swallowed it, then leaned back and watched his meaty shaft as it started to throb and grow. The huge cockhead reached his knee in mere seconds and he hasn’t even started yet. He licked his lips with anticipation and then started flexing his legs, pushing his tight jeans to their absolute limit. He then flexed his arms, making his huge biceps rise up like gorgeous mountain peaks as they started tearing up his T-shirt. The feeling of his muscles flexing and putting on a show for the weak nerds in the other room was more than enough to get his fat shaft extremely aroused and ready to burst out of its confines. He closed his eyes and imagined that he was fucking the lewdest female scientist ever, a busty bimbo with glasses that sported a big round booty and thick meaty lips made specifically for sucking dicks as huge as his. On the other side of the bulletproof glass, everyone was marveling at his insane size and the fact that he was only getting started. His beautiful muscles bulged and flexed one by one as his pants started giving in to the growing piece of man-meat between his thick legs. Derek started moaning as the sex session in his mind went one step further: he got bored with the nerdy bimbo’s pussy and started fucking her tight asshole while the cock-hungry bitch moaned like she was possessed. “Yeah bitch! Take that fucking fat cock up your hungry asshole!” he whispered as he could barely control his own thoughts. The female scientists in the other room were all wet at this point. They wanted to see more of this wonderful beast of a man, they wanted to see his manhood in all its glory. Just as they anticipated, it didn’t take long for him to fully reveal himself to them. As he started massaging his throbbing shaft through his pants, the monster started growing faster and his moans became more intense. He was ready to rip all his clothes to shreds. “Oh fuck yeah!! Take my fucking load in your fat ass!!” he moaned as his entire body flexed at once, making his manly muscles burst out of his clothes, leaving him completely naked and with a giant erection on full display.

None of the scientists could believe what they were seeing. This man had a cock that measured more than 30 inches and was easily as thick as a fire extinguisher. Not only that, but his balls were now so bloated they looked like actual basketballs. There was no way their fertility pill was this powerful as none of the previous subjects reached such an absurd size. “Damn! I guess I got a bit carried away there.” he said with a dumb smile as he scratched the back of his head. With his giant member now hard and throbbing and his imposing muscles on display, he looked like a genuine god of fertility, a man built by God for fucking and breeding. He needed someone to keep him entertained and judging by his extreme measurements, one woman surely wouldn’t be enough. Luckily for him, the female scientists were way beyond their breaking point in terms of sexual excitement. With cunts so wet that they resembled small waterfalls, they couldn’t control themselves anymore. With pure lust flooding their minds, they ripped their clothes apart like savage cavewomen while one of them opened the door to the hung stud’s chamber. They stepped through the door one by one, presenting their naked bodies to the superior male like fashion models on the stage, each one acting more slutty than the one before. The intense desire to be bred could be read on their small faces. The sight of six young women with various body types practically begging to take his monster into their tight holes made the stud even harder than he already was, pushing his giant dong past the 32-inch mark. The horny nerds approached him and dropped to their knees like obedient worshippers, then shamelessly started to lick and caress his muscular body and grind against his massive erection. Derek groaned softly as dozens of gentle fingers started running all over his thick legs and sculpted abs, not to mention his enormous nutsack. He was emanating pure masculinity, making all women yearn for his potent seed. He started to stroke his giant cock softly, making the monster grow further until its head eventually pushed past the meaty ridge separating his meaty pecs. He then shoved two fingers into his wet slit while his worshipers continued to work on his giant veiny balls. He always enjoyed playing with the wet sensitive flesh inside his urethra. It felt so good to finger-fuck his monster cock like a total pervert. As he pleasured his sensitive meatpole with his thick fingers, loads upon loads of delicious pre leaked out like water coming out of a showerhead. Naturally, the ladies did their best to try and drink as much of it as possible, covering their curvy bodies in his abundant precum like the bunch of cock-crazed whores they became as soon as they laid eyes upon this musclebound god.

Horny beyond measure, the stud thrust his strong hips forward, pushing his massive cockhead into one of the girls’ faces, loudly splashing the petite brunette’s figure with a massive load of precum. She watched with awe as the massive cockslit showered her with an abundance of manly cock-juice, its sudden movements feeling like an invitation she just couldn’t refuse. She bit her lips with anticipation as she looked directly into Derek’s eyes. “Do it!” he said with supreme confidence. She clenched her fist and brutally shoved her hand into Derek’s cockslit, the musclebound stud moaning hard as soon as she did so. It was clear by his lewd expression that this wasn’t the first time he had someone’s entire fist shove into his giant cock. He loved the feeling of his cock being stretched out like this, but this was mere child’s play for someone his size. “More!” he commanded, reveling in the intense pleasure his stretching urethra was giving him. The girl obeyed, pushing her fist further and then shoving her other hand elbow-deep into his throbbing manhood, stretching him out so much that his balls started to churn loudly. “Oh fuck!! So fucking good!!” the stud moaned loudly as he could barely contain his excitement. But the girl didn't stop at her elbows. She moved to a better position and continued to push her arms into his giant member until she got almost shoulders-deep inside him. That was the moment Derek completely lost control of his throbbing erection. He didn’t want to reveal the secret to his enormous manhood just yet, but this skinny bitch was badly asking for it! Derek grabbed the base of his shaft with both hands, keeping the monster steady as it started sucking the girl like in a vacuum. “Fucking dirty whore! Get in there!” he moaned as his cock sucked her head and shoulders in effortlessly, moaning continuously as his cock felt so good his mind could barely process it. The girl’s entire body started feeling numb, almost like she was nothing more than a meaty dildo for the stud’s cock. A few seconds later, the cock started shaking and growing again while the girl could feel her entire body being slowly sucked in. “YES!! FUCK YES!! DEEPER!! YOU’RE GONNA MAKE ME BIGGER!! THAT’S IT! FEED MY FUCKING COCK!!” he shouted as he swallowed nearly half her body. Even though she wasn’t a large human being by any stretch of the imagination, his cock still had to adapt in order to be able to fully swallow her. The monster cock expanded further in both length and girth, pushing past the 40-inch mark in the next 10 or so seconds. His incredible length was starting to come closer and closer to the girl’s height, but the sheer girth of it was simply unreal. Given the amount of blood such a giant piece of cockmeat would require, it was a miracle he hadn’t lost his consciousness. The other girls were simply mesmerized by what they were seeing. They didn’t know if they should run or simply wait for their turn to become cock-food. But one thing was clear: they wanted to see this whole thing through. He experienced a little bit of resistance when he reached her hips, but nothing his majestic cock couldn’t easily adapt to. The slit opened wider, allowing for the entire body of the victim to easily pass through. With more than two-thirds of the girl already inside his cock-canal, Derek started slowly stroking his cock. The others couldn’t believe how much his cock stretched in order to accept the girl inside. He didn’t even look like a human being anymore with that giant bulge slowly moving alongside the length of his shaft. But his pheromones were so strong that there was a single goal in their minds: worship those godly nuts that would soon get a lot bigger. A minute or so later, the girl’s legs completely entered the wet helmet of Derek’s cock and the slit finally closed behind them. Now he would just let gravity do its job, the girl slowly sliding further down until she eventually reached his massive veiny balls.

"That's it! Now you are mine!" the stud moaned as he started stroking faster. It didn’t take long for the petite scientist to get comfortable with the inside of his bloated nuts, making them swell even more as she added her own size to theirs. Everything felt so calm in there, like the world outside completely disappeared. Everywhere she looked or reached out, there was only cum. The most amazing cum the world had ever seen. It was so thick and potent and abundant it felt intoxicating, rewiring her brain and wiping away every memory she ever had. She felt like she was in heaven. She wanted to be part of him, now and forever. Little did she know, that’s exactly what she was going to become. Derek reached down and touched his massive orbs gently, feeling their immensity and the huge finger-sized veins now riddled all over them. It was time to claim this girl’s body, melting her in order to further evolve his godlike body. His cock started pulsing like a beating heart as it went to work, absorbing everything the small being had to offer. The other girls continued licking and massaging his massive balls while the energy started flowing throughout his entire body, bulking up his muscles, adding more inches to his already ridiculous cock, and filling his nuts with so much cum they turned into giant balloons. He closed his eyes and relaxed his body, waiting for his muscles to stop growing and his cum-reservoirs to completely fill up. Slowly but surely, his muscles grew, adding more breathtaking size to his already incredible physique. His cock also added inch after inch, eventually stopping at the 44-inch mark. “Oh fuck baby!! You’ve been such a good girl! Too bad you couldn’t give me more!” Derek said as the growth was nearing its end. He gained about 15 lbs of pure muscle mass, which wasn’t a lot, but still not bad either. With testosterone coming out of every pore of his being, Derek was ready to fuck. His balls were so insanely bloated that they looked ready to burst. “Now, who wants to be first?” he asked with a perverted grin on his face.

The most courageous girl of the bunch, a busty blonde with wide hips and a fat ass, got up and bent over, then gently placed her leaking cunt in front of Derek’s cockslit. She spread her pussy as much as she could, struggling to make more room for the monster she was about to take inside her. She could feel the warmth emanating from the massive cockhead, as well as the abundant pre leaking like a small torrent, lubricating her beautiful holes for the most brutal penetration of her entire life. She pushed her love-hole against it and tried to take it in slowly, but the monster was so large it barely got in at all. Even so, the blonde’s tears started coming out as she struggled to relax her lower body in order to fit more inches of cockmeat in. Even the 2 or so inches that managed to get in brought her so much pain she felt like she was giving birth. She started wondering if she should just give up and let another girl try and tackle such an unnatural monster of a cock. But before she could make a decision, the musclebound stud got bored and decided to take control of the situation. He grabbed both of her hands and pushed his hips forward, slamming half of his length into the girl with a single thrust. The girl screamed so loud she broke the other out of their cock-craze for a few seconds. She could feel her insides being brutally pushed aside in order to make room for the titanic cock that was now ravaging her insides. “Oh come on! I’m sure you can take more inside you!” Derek said with a lewd grin as he started moving his hips. The girl could feel the giant cock moving in and out of her like a battering ram, rewiring her entire anatomy in order to pleasure the hung stud’s massive dick. It didn’t take long for her mind to completely break too following the brutal fucking the monster was unleashing upon her overly-stretched cunt. Derek moaned with pleasure as he managed to squeeze a few more inches of dick-meat into the girl as he rammed her again and again with authority. "Your pussy and womb feel so fucking good! You’ll be my first cum recipient for today!" the stud moaned as he started thrusting even faster into the near-motionless scientist. Her big boobs bounced wildly with every thrust, her cunt was leaking at an alarming rate and her eyes were now completely white, not to mention she was salivating continuously, almost like she was brain-dead. The other girls watched the brutal onslaught with both fear and genuine curiosity as they continued to worship the massive fleshy orbs that Derek could barely contain anymore. He fucked the girl for a little over 10 minutes, but for everyone else, it felt like an eternity had passed. He couldn’t restrain himself anymore. With a loud groan followed by an involuntary flex of his entire musclebound body, Derek exploded inside the busty blonde. As he did so, he could feel the girl bloating around his massive shaft, her belly ballooning out three times the size of her entire body as a monstrous jet of cum got released into her. He fired cumshot after cumshot and her body took it all, unable to spill a single drop as her battered pussy was sealed air-tight around the stud’s cock. She got so full that the cum started coming out of her mouth and ears, turning her into a veritable mind-broken cum-fountain. Even though he had plenty of fun with her, she was now full and unable to be used anymore. He needed another hole to fill as there was way more cum in those giant nuts of his. He pushed the blonde off his dick like a used condom then turned his attention to the others: “So who wants to be next?”