The Boy: Dad what happens when you start to grow hair down there? [peach fuzz]
The Boy: You know DOWN THERE! (pointing at crotch)
Me: Oh that means you are starting puberty.
The Boy: Puberty?
Me: Yea you know the time you start to grow hair down there and your willie falls off.
The Boy: SHUT-UP!
Me: All kidding aside this is when you start to become a man.
The Boy: I thought I already was.
Me: You got a loooong way to go.
The Boy: Yeah I guess so, you got hair on your belly. Mine hasn't gotten that long yet.