A father and son walk out onto their porch overlooking the stream and the father puts his arm around his son, stares at the scenery, and asks: Dad: Son, do you have any questions for me about sex? Boy: Yes as a matter of fact I do. What's that hairy patch below Mommy's waist, in between her legs? Dad: That's her vulva. Boy: Oh... Well, what's a cunt? Dad: That's the rest of Mommy.