Ed. U. Cation!
Because there were too many rulers in school!
Pupil: I was mugged on the way to school and the mugger took everything I had
Because two Wongs don't make a Wright.
Because it was invented by a black person!
One of them is a flimsy thing that refuses to stand up on it's own. The other is a medical condition.
He paws-ed it!
Backwards.
Subtract her clothes, divide her legs, give her a square root and watch her multiply.