They Don't Appreciate the Jokes, But I Still Make Them
An after-school conversation with one of my daughters:
Me: What did you learn in school today?
Her: We learned about meters, and, uh, some other thing that started with a "d".
Me: Oh, you mean the metric system?
Her: Yes!
Me: Well, it's very important that you learn the metric system. Do you know why?
Her: No.
Me: Because the U.S. will convert to it in 1977.
Her: [Blank look, then an eye-roll, since she's not sure whether or not the joke's on her.]