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.