A Mother is driving her little girl to her friends    house for a play date.      "Mommy," the little girl asks, "How old are you?"    "Honey, you are not supposed to ask a lady her age,"    the mother warns.      "It is not polite."      "Ok," the little girl says, "How much do you weigh?"      "Now really," the mother says, "these are personal    questions and are    really none of your business."      Undaunted, the little girl asks, "Why did you and    daddy get a divorce?"      "That is enough questions, honestly!" The    exasperated mother walks    away as the two friends begin to play.      "My Mom wouldn't tell me anything," the little girl    says to her    friend. "Well," said the friend, " ... all you need    to do is look at    her drivers license. It is like a report card, it    has everything on it."      Later that night the little girl says to her mother,    "I know how old    you are, you are 32."      The mother is surprised and asks, "How did you find    that out?"      "I also know that you weigh 140 pounds."      The mother is past surprise and shock now. "How in    heavens name did    you find that out?"      "Annnnd," the little girl says triumphantly, "I know    why you and daddy    got a divorce."      Oh really?" the mother asks. "Why?"      Because you got an F in sex."