He became enlightened.
He said "Darling you've got lovely teeth."
He got off on a technicality
Something a woman does while a guy is f***ing her.
His sc*aaarrrr*f Edit: I get it guys, you all have better punchlines than me.
It's because of all the crude oil they keep ingesting.
Because the floors Argon.
Because, if you can't 'helium' or 'curium', you 'BARIUM'!