You hardly even notice Peter as you fall down to examine your new legs that are still changing and growing more hair until you have a thick short coat of hair. The raw masculinity of your new body is enough to get your new horse-like libido flowing and you can only think of what your new cock would feel like in a tight ass. With how large it is now, you might even be able to suck yourself. You begin by trying to remove whatever is left of your pants...
"Whoa! Hold on there! I know the tingle in the back of your head is gone but your have to hold on to some restraint!" Peter yells trying to get through to you, but your blood is rushing through your ears louder than he can yell. As you continue to ignore Peter, one final rip releases your new cock from its confinement. The sight of it, a heavy 14 inches not fully erect and a pair of balls to match, makes your heart beat even more blood down to the engorged member. The loss of blood seems to mess up your head more than the beer ever did.
You start wanking on your massive horse cock and the precum begins to flow freely. You bend your head down and... YES! You can reach the growing head with your lips. The scent and taste of your bovine precum drives you insane. The combined warmth enveloping the head and your furious hand motions quickly brings you to your new fully erect size of 18". Sitting there you beat away at your cock, sucking all the juices from it until you feel the familiar pull in your scrotum. Your just about to cum and it feels stronger than you have ever cum before! The pressure builds to the point that it feels any little stimulation could make you blow your load, and you do. You throw your head back and blow a massive load!
Right into Peter's face...
The release sobers your mind and your blood begins to flow back to your head (as in the one with the brain in it). You look up at Peter and see just how much you actually came. You'd be impressed if it weren't for the look on his face.
"I am SO SORRY PETER!!! And after you invite me into your home and... gave me a magic beer? Actually, what just happened?" despite your questions, Peter just walks away leaving you questioning even more... "Peter? PETER! WAIT, I REALLY AM SORRY! I don't know what came over me!" Peter pauses for a second just before walking out the door, giving you just enough time to catch a glimpse of the massive boner he was trying to hide.
Hopefully that means he isn't too angry and will come back. If not then, you wont know what to do being locked in here, alone and naked...