Because it goes right out of your head.
Brushing your teeth!
All I Want for Christmas is my two front teeth!
A Pull-it-surprise!
What did the elephant say when it was pulled out of a pit by the Balls? Thank you Mr. and Mrs. Ball!
To stop themselves sinking into the sand. Why did the ostrich stick its head in the sand To look at the camels who forgot to put their sandals on.
Goldfish: I forgot Goldfish 911: Forgot what Goldfish: WHO IS THIS Goldfish 911: I DON'T KNOW
On the side of his head.
I have only my shelf to blame"
It needed a filling.
tooth-hurty