1. A Stomachache

A: I have a stomachache.

B: Is it something you ate?

A: Maybe. I'm not sure.

B: What did you have for breakfast?

A: The usual, cereal with milk and a banana.

B: Maybe the milk was bad.

A: It didn't smell bad.

B: Maybe the banana was bad.

A: No, the banana was delicious.

B: Maybe you just need to go to the bathroom.

A: No, that's not the problem.

B: Maybe it will go away in a little while.