Little Johnny comes home from school. His mother asks, "What did you do in school today?"
Johnny: We had Show and Tell and we had to tell about someone we love. So I told them about you.
Mother: How sweet! So, what did you tell them about me?
Johnny: I told them you're blond, with blue eyes, you're 5 feet 4 inches tall, you were born on July 1, 1990 and you weigh 135 pounds.
Mother: I never told you any of that before. How did you know all of that?
Johnny: I sneaked into your purse and looked at your drivers license. Oh, and I also told everyone why you and daddy fight all of the time.
Mother: And how would you know that?
Johnny: Because you got an "F" in SEX.