Two guys at the bar. One says: "you won't believe me, but I can bite my right eye. One beer if you loose the bet? "
They shake hands or whatever you do in that part of the world to seal a bet and then our guy takes out his right (glass) eye and bites in it.
One beer later our guy says "you won't believe me,I but I can bite in my left eye as well."
They confirm the bet. Our guy takes out his dentures and bites in his left eye.
One beer later our guy says "you won't believe me , but I can piss in your right trouser pocket and you don't get wet".
Well, the bet is confirmed, our guy takes out his noodle and pisses in the right pocket of his betting partners trousers.
"Fuck, my trousers are all wet!"
(giggling) "Sorry, sometimes I lose a bet...."