Jeff's dad hurredly entered the sire booth, eager to begin. Jeff saw that his father's bullish cock was already half hard and sliding out of the sheath. "Gross, I really need to change this all back when I get home!", he thought to himself. All the men in the world had bull cocks and raging libidos!
Jeff began to look around for a razor when he felt a strange feeling in his loins. He felt his massive cock slowly swelling with blood. Jeff grunted softly to himself at the feeling. "Fuck, why am I so horny all of a sudden?!". He looked between his huge bull legs and saw his half hard dick almost all the way out of his sheath. It was dripping thick precum all over the floor. Nasty! Jeff saw his huge, weighty balls swinging between his legs, each one about the size of a grapefuit. "Uggh, now wonder I'm horny, with those attached to me!", Jeff thought. Maybe his dad was right, maybe it was time to begin using the sire clinic. Jeff was mortified at the thought, but he was so horny he couldn't think straight. Plus, in this reality, it was apparently normal.
Jeff looked down at his body. He had sprouted chest hair with the changes, and he could see tufts of hair peeking out from under his arms. The body hair must have come from the bull side of him, or from all the testosterone his huge balls now pumped into his system. Jeff felt his face and as met with raspy stubble. He was obviously matured enough to do this. PLus, his massive bullhood was so hard, he didn't really have a choice.
Jeff went up to the counter and paid, opting for the cheaper option, as he didn't have very much money. He was led into a large room with many different booths, only seperated by a flimsy curtain. Jeff was disgusted at the noises; moans, squelching noises, and loud humping noises were being emitted from the other users. His disgust did nothing to abate his throbbing erection, however. He had to get off now! He felt ashamed that his first time would be with a fake latex vagina, but his needs were too powerful.
The attendant closed the curtain and left Jeff to be. He ws standing in a small room with nothing but a large fake metal cow, with a latex vagina. Fuck, he was horny. He wasted no time trying to mount the fake cow. Not being used to his massive bull body, it took a while for him to situate himself on the cow. His pulsating bull dick found the mark soon enough, and Jeff thrusted, hard. The artificial vagina was already lubricated, and it was warmed up as well. He gasped at the feeling, the tight latex sleeve hugging his massively huge bullish member. The entire length of the weighty shaft was being hugged by the sleeve. Pretty soon Jeff was balls deep. He began to thrust and rut his gant lower body, sliding in and out of the dummy cow. It felt incredible! Jeff felt his huge balls slapping against the cow as he thrusted in very roughly and powerfully. Lost in the rut, Jeff began loudly moaning, his balls making loud slapping sounds and his huge cock making wet sucking noises as it was thrust in and out.
Jeff kept rutting against the cow for well over 15 minutes. Jeff was pounding it so hard that the screws came a bit loose on the bottom. Not that he would have noticed, however, as every thought was about these new wild sensations and desires. Finally, Jeff felt a huge pressure build up in his groin. He moaned deeply as a rush of chunky yellow bull cum came flying out of his massive tool. "UUUUGGGHHHH", he yelled as shot after shot came flying out. Jeff humped deeply into the cow with each pulse.
Finally, the powerful orgasm subsided, and Jeff collapsed on the metal cow, panting and sweaty. He pulled his softening cock out of the cow with a loud SHLORP sound. He noticed it was covered in bull cum and still dripping, but he didn't care; he would clean it later. His dirty cock receded back into the folds of his sheath, out of sight.
Leaving the clinic, Jeff saw his dad waiting right by the enterance with a big grin. "So, Jeff, you changed your mind? Atta boy!, or should I say 'man' now?". Jeff blushed a deep red. "No reason to be ashamed Jeff, it's perfectly natural!". "With balls like those", his dad said, gesturing to the weighty black orbs hanging in his sac, "you don't really have much of a choice! Now, let's go buy you that razor". Jeff's dad started walking and stopped, theatrically waving his hands in front of his nose. "And we will buy you some deodrant, Jeff, you worked up quite a sweat during your 'session'!". Jeff blushed an even deeper red as he followed his dad in the store.