Are caterpillars good to eat?
Johnny: Daddy, are caterpillars good to eat?

Father: Have I not told you never to mention such things during meals!

Mother: Why did you say that, Junior? Why did you ask the question?

Johnny: It's because I saw one on daddy's lettuce, but now it's gone.

A lawyer returns to his parked BMW to find the headlights...
A lawyer returns to his parked BMW to find the headlights broken and considerable damage. There's no sign of the offending vehicle but he's relieved to see that there's a note stuck under the windshield wiper."Sorry. I just backed into your Beemer. The witnesses who saw the accident are nodding and smiling at me because they think I'm leaving my name, address and other particulars. But I'm not."