20. Bird Poop

A: I cleaned my car yesterday.

B: It's not clean anymore.

A: What happened?

B: Take a look.

A: Oh, no! There's bird poop.

B: That's unfortunate, since you just washed it.

A: Can you wash my car?

B: I'll wash it for $15.

A: This can be your birthday gift to me.

B: It's a deal.

A: Have fun washing the poop off.

B: Sometimes I wonder why we're friends.