Jackson, entering the bathroom while I pee: Mommy, why you have a gina?
Me: Well, because I'm a girl.
Jackson : (laughing) No, you have a PENIS! Hahaha!
Me: No I don't, you silly boy.
Jackson: What's that?
Me: It's hair.
Jackson: Why you got hair?
Me: Because I'm a grown up. All grown ups have hair there. You'll get some someday too!
Jackson: (beaming) Oh! Thanks Mom!
(as if I was the pubic hair fairy, waving my magic wand and granting him grown up pubic hair!)