Because you won't be smiling when the cops pull you over.
Because his name is Hov, OH, H-to-the-O-V
When they get to third base they think they've scored
What did the elephant say when it was pulled out of a pit by the Balls? Thank you Mr. and Mrs. Ball!
She pulled her pants up.
A Pencil cause he's full of lead!
Pork! Pork! Pork!
Smiles Edgeworth
The Mona Lisa is smiling because Chuck Norris let her live.