Himbo pussy serum

by BaraBootyEater

Josh and Jason are a pair of horny bio-engineering students who’ve created a serum that can cause some muscly changes to those they give it to.

Jason shook Joshua awake. He had just made a breakthrough in the lab!

“Jason! I made a serum that has a high chance of success!” Josh happily shouted.

Josh and Jason are recently graduated high-school seniors ready to go into bio-engineering programs in a few months. Their youth did not stop them from attempting research to create a “super soldier serum”, though their plans had slightly morphed to fit the boys’ hornier mentality.

“So, if we inject this serum into a matured human male, it will cause a rise in testosterone which will increase their muscle mass, penis size, and some other special changes,” Jason explained with a smirk. “Now all we need is a volunteer.”

They pondered some choices.

“Hi Mason,” Joshua greeted, when the other man opened the door. Mason was another bio-engineering major. Like the other boys, he was a tanned Hispanic guy. Unlike them, he was a bit taller and heavier than them. He was not fat, but stocky with a slight belly. “Would you be interested in this muscle growth serum Jason created? He said it should be highly successful.” Joshua asked.

“Sure! You both are talented, and I believe that you could create a successful serum,” Mason agreed.

They went over to the boys’ lab. Joshua pushed the syringe into Mason’s arm. The serum would begin working within a minute so, all there was to do was wait.

Thirty seconds and Mason had begun to sweat. His body slowly began to pack on muscle mass. It was not noticeable at first due to his t-shirt and jeans covering his body. His muscles started pressing against his clothes, and a large amount of muscle bubbled his ass. The pair of hairless golden butt cheeks shredded his underwear and jeans while Mason struggled to cover it. His pecs burst out of his shirt with a pair of quarter sized, dark brown nipples on top of each.

After Mason’s height hit 6’10, it seemed like everything stopped—until Mason moaned as his cock lengthened slightly, before thickening to the size of a soda can. Mason stood up, grunting while the boys watched his body pulse and drip with a sweet-smelling sweat.

“Wow, Jason!! You were right, this is the breakthrough” Josh shouted happily.

Mason grinned. “This is amazing, I’m so huge!”

“Now what do we do with this huge himbo in our lab?” Jason asked aloud.

“Try this first, it’ll help us,” Josh said, handing Jason a small green tablet and keeping another for himself. After eating the tablet, their cocks started to elongate. This first dose was enough to turn Jason’s 7 inches into 12 inches of rock-hard Latin meat. Joshua’s cock, however, went from 8 inches to an astounding 15 inches with tons of veins.

The boys ditched their pants and walked to Mason. “We have our pants off for a reason, it’ll help us relieve something that you’re about to experience,” Jason said.

Mason looked confused. “What’s going to ha…ahh—” He moaned loudly as the boys began to suck on his massive muscle tits. “Why does my ass feel so, tingly inside?” Mason groaned. The boys sucked while molesting Mason’s smooth brown butt cheeks which seemed to have a slightly shiny liquid dripping out “Those cocks are so big! I—I want to ride them.”

Josh and Jason laughed as they approached Mason while he lowered on his knees. They were going to get lucky.

Mason sucked Jason’s smaller cock first. It was easier to slide down his throat as he mouthed over the long uncut dick. He buried his face in Jason’s hairy ball sack and sniffed. Suddenly sucking on Jason’s huge nuts earned him a grunt of pleasure from him. He switched to Josh’s monster and could barely get most of it in before gagging. Joshua grabbed Mason’s pretty face and began to fuck it. This caused Mason to gag and choke while his eyes rolled back. “Fuck me good—” his rounded eyes seemed to be saying while they face-fucked him.

Josh was the first one to go around to Mason’s huge muscle booty. He slipped a glove on and examined it. He found a translucent grey substance resembling semen but oilier, dripping out of Mason’s hole. He slid a few fingers in, earning a loud horny yelp from Mason. Josh maliciously fingered Mason’s booty to make him tighten up and release more of his anal lubricant.

He felt an urge to taste the liquid and was shocked at how sweet it tasted. He dived his face between Masons golden ass cheeks and licked at Masons tight brown hole. Jason soon joined which made Mason press the boys’ heads deeper in his ass. “Guys! I feel strange, like I’m going to cu… I’m going to…” Mason whined as his man-pussy shot a large spray of that sweet tasting pussy juice all over each of the boys’ faces. They happily lapped it up as it dripped out of the tight brown pussy in front of them.

Joshua could not hold back. He decided to grab the huge butt cheeks and spread them to feel Mason’s hole. He teased the entrance with his huge cock head and then gently slipped the tip inside, earning a loud whine from Mason. They had turned Mason into a huge, thick muscle god with a wet and slippery pussy. All that was left was for Josh to slide the rest of his 15-inch horse cock into the horny himbo in front of him.

“Daddy! Please fuck my tight muscle pussy! It was made to serve big cocks! I need your cum, please daddy!” Mason sputtered until Jason forced his cock down his throat. Joshua complied and began to roughly slide his huge sausage down Masons beautiful brown butthole! Mason leaked pre-cum out of his thick cock and his muscle pussy. The two scientists felt something coming and started grunting loudly before finally shooting huge loads out of their swollen, tennis-ball size nuts.

Mason fell flat on the ground, drunk from the sheer amount of potent cum that had been pumped inside of him. He moaned while Joshua’s baby batter squirted and bubbled out of his hole.

Josh and Jason were roughly kissing while fantasizing over who they could change at their college. The number of guys waiting to be turned into smooth, cock hungry, massive himbo sluts was driving them crazy. The two were ready to conspire to turn their college into their own personal himbo harem.

Vote on this story

The salt: the African-American by RdyRoger 3 parts 3,969 words Added Jun 2010 15k views 5.0 stars (2 votes) No comments yet •Cock Growth•Huge Cock•Muscle Growth•Muscle/Strength•Increased Libido•Voice Deepening•Size Increase•Race/Ethnicity Change•Hair Growth/Getting Hairy•Hairless•Tongue Growth•Nonconsensual change

Simon says by BRK My goofy, fun-loving shop owner loves staging these ridiculous competitions with us, but this latest one is definitely the craziest. 2 parts 7,732 words Added May 2013 Updated 30 Jun 2017 24k views 5.0 stars (10 votes) No comments yet •Cock Growth•Huge Cock•Hyper Cock•Extra digits•Multi-abs•Multicock•Multiarm•Multilimb•Muscle/Strength•Getting Taller•Size Increase•Suggestion

Small problems by The Obsessive-Compulsive College freshman Curt has certain inadequacies he’d like to correct. (Hint: Remember the “Better Living through Chemistry” meme?) 7 parts 9,668 words Added Sep 2009 39k views 5.0 stars (10 votes) No comments yet •Cock Growth•Huge Balls•Huge Cock•Hyper Cock•Hyper Cum•Increased Libido •M/M

Stuff in the cellar by Charles Westfall Richard is already good-looking and abnormally hung when he discovers some alien equipment in the cellar of his new house—including a vat of goo that transforms him into someone even hotter and more hung. And there’s no way Richard’s keeping his new gifts to himself. 4 parts 15k words Added Jul 2002 25k views 5.0 stars (9 votes) No comments yet •Cock Growth•Huge Cock•Hyper Cum•Muscle Growth•Muscle/Strength•Pointy Ears•Size Increase •t/t•t/t/t

Transform by Also Known As Containing a secret is a hard thing to do. And the bigger the secret is, the harder it is to keep. No one was finding the truth of this more than those few men in charge at the Institute for Genetic Enhancement where the way has been found to transcend ordinary masculinity. The sequel to Supermen. 35 parts 132k words (#8) Added Oct 2002 73k views 5.0 stars (11 votes) No comments yet •Cock Growth•Ball Growth•Huge Cock•Prehensile Cock•Multicock•Muscle Growth•Muscle/Strength•Muscle Worship•Voice Deepening•Hyper Pheromones•Infectious•Flying •M/M•M/M/M

Unexpected consequences by Alex 2 parts 5,254 words Added Oct 2005 18k views 5.0 stars (4 votes) No comments yet •Cock Growth•Huge Cock

Trade by MaxMorphs Discovering the ability to trade a part of your body for part of another naturally leads to experimentation with inches of cock, and with just how far you can transform someone who really wants it. 3 parts 3,360 words Added Feb 2017 21k views 5.0 stars (16 votes) No comments yet •Cock Growth•Huge Cock•Hyper Cock •M/M

The Servonyx exclusion by BRK Uncovering some corporate skulduggery leads to dire consequences for Beck. Nearly killed in a suspicious crash, he soon finds himself halfway around the world trapped in a physically enhanced pleasure humaniform… in the keeping of a handsome Russian plutocrat. Pleasure is easy to unlock in this new existence, but escape and revenge will be a lot harder to manage. 3 parts 14k words Added Jul 2018 Updated 17 Nov 2018 11k views 5.0 stars (10 votes) No comments yet •Cock Growth•Multiarm•Multilimb•Muscle Growth•Size Increase•Age Difference•Nonconsensual change•Androids/Cyborgs •M/M