How many punk rockers does it take to change a lightbulb

Question: How many punk rockers does it take to change a lightbulb?

Answer: Two: One to screw in the bulb and the other to smash the old one on his forehead. Answer: Four. "Why four?" I just reckon it to be about four, pal. Want to make something of it ?

Answer: Three. One to do it and two to argue about who did it first.