The joke is that 15 has pubic hair on his head. Which, is a long running racist joke here in the states.

Like this joke I once heard, "Why do black people think about sex so much? You would too if you had pubic hair growing on your head!"

**********
"Everyone has a plan until you punch them in the face. Then they don't have a plan anymore." (c) Mike Tyson

"One of the most important things in life is what Judge Learned Hand described as 'that ever-gnawing inner doubt as to whether you're r