A guy goes into a tattoo parlor and asks for a tattoo of a $100 bill on his penis.
Curious, the tattoo artist asks him why he would possibly want that.
“Three reasons: I like to play with my money, I like to watch my money grow, and a hundred dollars seems to be the only thing my wife will blow these days. “
This joke is included in the Black Book of Jokes. You can order it from here.