"Dirty Joke": Sex Ed

A little boy and a little girl are in the woods. The girl asks the boy, "What is a penis?" The boy replies, "I don't know." At that time, his mom calls him in for lunch. After eating, he sees his dad on the couch. He goes up to his dad and asks, "What is a penis?" The dad whips his out and says to the boy, "This is a penis, as a matter of fact this is the perfect penis." Afterwards, the boy and his friend return to the woods. He tells her he knows what a penis is. He whips his out and says to her, "This is a penis, and if it was two inches smaller it would be the perfect penis!"