Will decided he would take some of the stuff and mixed a single drop in a glass of water. Downing the glass with one gulp he burped as he closed the vial again, noticing for the first time a label at the bottom.
He just chuckled as he read 'Hung Like A Horse' before putting the vial down and grabbing his stuff to head out the door.
Just as he was about to exit his house he stopped dead in his tracks as a pleasurable tingle began to emanate from his groin. Dropping his things he went and sat on the couch in case he lost his footing. Looking down at his crotch he could see the outline of his cock snaking its way out of his underwear and down the leg of his shorts.
As quick as it had started it was over. Will quickly undid his shorts and dropped them and his underwear to the floor causing his now 8 inch soft member to pull downward on his groin. It was long and thick now, and actually kinda reminded him of a horse cock he once saw. The color was normal but the head definitely looked a little horselike, but not enough to keep it from passing as normal for a human.
Will thinks for a second... wondering if he should go to his girlfriend's like that or take another glass first....