1. Are marbles made of marble?
2. Can you make a candle out of your earwax? (Remember the movie Shrek?)
3. Can you get cornered in a round room?
4. Why do companies offer you "free gifts?" Since when has a gift NOT been free?
The above are just a preview to the plethora of such quotes in http://www.goodquotes.com/funnythoughts.htm