"That’s the elephant’s trunk, dear," she replies.
"No, Mom. Down underneath."
His mother blushes and says, "Oh, that’s nothing."
The father returns and the mother goes off to get a soda. As soon as she leaves, the boy repeats his question.
"That’s the elephant’s trunk, son."
"Dad, I know what an elephant’s trunk is. The thing down there."
The father says, "Oh, that’s the elephant’s penis."
"Dad," the son asks, "how come when I asked Mom, she said it was nothing?"
The man takes a deep breath and explains, "Son, I’ve spoiled that woman."


