A mother is driving her young daughter to her friend’s house for a play date.
"Mommy," the little girl asks: "how old are you?"
The mother looks over at the little girl and says: "Honey, you are not supposed to ask a lady her age, it isn't 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?"
"Enough of your questions, honestly!" The exasperated mother drops her daughter off and leaves her to play with her friend.
"My mom wouldn't tell me anything," the little girl says to her friend, a few moments later.
"All you need to do is look at her driver's license," the friend replies: "It is like a report card, it has everything on it."
Later that night the little girl says to her mother: "I know you are 32."
The mother is surprised and asks, "How did you find that out?"
"I also know that you weigh 140 pounds," the little girl says.
The mother is past surprise and shock now: "How in heaven's name did you find that out?" she asks.
The little girl continues on triumphantly, "And... I know why you and daddy got divorced."
"Oh really?" the mother asks: "Why is that?"
To which the girl replies: "Because you got an F in sex."