Everyone delights in wordplay! When there's a sale on tennis balls, it's first come, first serve. Condoms should be used on every conceivable occasion. Why does the Pope travel so much? Because he's a roamin' Catholic. What is purple and 5,000 miles long? The Grape Wall of China!
O-pun the door to 1,001 goodies that will have you howling or groaning, but certainly—like the surgery patient—in stitches.