Joke

Joey is standing in front of the urinal doing his business when a large black friend of his walks up to the next urinal. Joey looks down and says, "Damn Mike, how come you guys have such big dicks?"

Mike decides he's had enough of the dumb questions so he says, "Well, I work at it. Every night I got home and tie my cock to a piece of string and then tie the other end of the string to a big ol' rock and then I swing the rock between my legs for an hour."

Joey gets all excited, thinks he's learned the secret of all secrets and rushes off.

A week later, Mike is walking down the street when Joey comes walking the other way. Mike says, "Hey, how's that working out with the rock and the string?"

Joey says, "It's working pretty well. I mean, it's not getting any longer but it's starting to turn black!"