Would a fly without wings be called a walk?
Q: If an electric train is traveling north-by-northeast at 59 MPH, and the wind is blowing west at 18 MPH, which way is the smoke blowing? A: There is no smoke; it's an electric train.
Q: What did the math book say to its therapist? A: I've got a lot of problems.
Q: What did one streetlight say to the other?
A: Don't look, I'm changing.
Q: Why are fish easy to weigh?
A: Because they have their own scales.