A hand.
Editor's note:Do you need something to smile about? Every day, WND selects the best joke offered up by readers and contributors to its Laughlines forum and brings it to you as the WND Joke of the Day. Here is today's offering:
The young lady said to Grandpa, "I've noticed you're still as polite as ever. When you sneeze, you still put your hand in front of your mouth."
"Of course," explained Grandpa. "How else can I catch my teeth?"