Cause they would quack up.
You won't be able to tell witch witch is witch.
Because he's not a rat.
Trick question, you can't cross a vector and a scalar.
Plane" Bagels!...
An anti-joke.
I think it's because usually the punchline is too long
You don't. You get down from a duck.
Amok
Ducts out of water...
Cause he's dead.
Because she was a quack.
Duck tape!