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 very interesting fact
Doctor: Did you know that there are more than 1,000 bones in the human body?

Larry: Shhh, doctor! There are three dogs outside in the waiting room!