Sat down !
Because they cantaloupe. (The wife thought of this one... hopefully nobody else has posted it)
They think all the white pieces are kings.
I was asked on an internet forum. "Because you're not allowed to take them on planes," I answered.
Wave a two-ton banana in front of his nose.
They both know "what a girl wants" and "what a girl needs".
Because he was the rightful heir
She goes to the bathroom.
Elevaders