One of my friend's frat brothers is the type of guy who'll do just about anything when he's drunk, so one night when they were trashed, they told him that they'd pay him 50 dollars if he'd fuck a cow, so of course, he agreed (the amount being more than $40). So they go out to this field and a bunch of cows are asleep so he starts to fuck a cow. She wakes up and kicks him, sending him flying, but the story gets worse from here...
Apparently, a few days later he started to develop a rash on his private areas and went to the doctor whose first question to him upon seeing the rash was, "Have you been doing anything with farm animals?" So our little frat boy was sent home with a cream made especially for people who fuck cows.