An old man was sitting on a bench at the bus stop. A young fellow came and sat down beside him. The youngster had a purple Mohawk and was totally covered with tattoos and metal piercings. Aware that the old guy was staring at him, he said: "what's the matter, old man, you never done anything wild and crazy?" The old man said "yes, I have. I had sex with a parrot seventeen years ago and I was just wondering if you were my son."