"Punk Rock!" joke

An old guy's sitting on a bus when a punk rocker gets on. The punk rocker's hair is red, green, yellow, orange, he's got feather earrings, and he sees the guy staring at him. He says "What's the matter, old man? Didn't you ever do anything wild?"
The old guy says, "Yeah. One time I had sex with a parrot. I thought maybe you were my kid."