Why can't the Earth ever get anything done?
Because it's always running around in circles.
Do you know the name Pavlov?
Why was the fruit thrown in prison?
What do you get if you cross a bike and a flower?
What's black and white and red all over?
Why are elephants wiser than chickens?
What does one piece of bread say to the other?
What do photographers read to their children before bed?
What musical instrument is the best typist?
Why was the fruit busy on Friday night?
Why was the cow afraid?