Because he's not a rat.
The police made him bring it back again.
The police heard it was full of pedal-philes.
Because if his punch line doesn't work, you still get a kick out of it.
Apricots. I used to love this joke when I was a little kid and told it over and over. I'm still a little in love with it for that reason. What are some of your favorite jokes from when you were a little kid?
Hide n' seek
Hide and Speak!
Battle Royale with cheese
Bologna & cheese!
Nothing, you can't cross a vector by a scalar. EDIT: changed multiply to cross.
The higher it flies, the much.
Because they're scared of the mouse.
It hasnt been tested on mice.