Asian swamp eel
A common practice between friends in Japan resulting in one friend slipping an eel into another friend's rectum. It is most commonly done as an old traditional drinking game in which the first person to pass out is the lucky recipient. Daniel Tosh loves this prank, especially because it results in massive internal hemorrhaging and dehydration thus resulting in death due to hypovolemic shock.
One day, Daniel Tosh, a very strong supporter of globalization, agreed to party with a group of Japanese chefs. Tosh, being the lightweight that he is, got very drunk, took his pants off, and passed out at the party. The Japanese men spread his cheeks and inserted their prized swamp eel into his rectum. Luckily for Tosh, he was so used to taking things in the ass that the swamp eel had little effect. To this day the Asian swamp eel lives in the lower bowels of his intestine, eating the pride (that he swallows daily).