after the scientist gives both you and the other man in the room the shots, the injection sites stay to swell up almost immediately. odd hairs were growing on the lump forming on your arm, dark brown color as the scientist talks some quick notes on the changes you and your new friend were undertaking.
"The serum is taking effect, everything simbes to be going as normal as the rest. OK just enjoy the changes and ill get back in a few." the doc said as if all of this is normal as she leaves the room, leaving both of you standing in scrubs. slowly growing very sweaty and very horny as you see the other man's penus harden fast pointing out of the scrubs in a similar manner as your own.
you both try to find a comfortable spot in the room to sit and watch the changes or at least masturbate as both you and the man were feeling the more pleasurable effects of the serum. the other man was growing patterns of light brown hairs simuler to the dark hairs grown over your body.
"I'm sam...how are you...taking this?" pointing over his body, seeming to be better at pulling down his simple cloth dress over his own member, staining it with the pre cum leaking out. he must feel as blue balled as you look at your own member not only was already leaking seed and begging for release. before you can answer but than...