Nobody knows.
H Edit: I don't like explaining jokes but since the first guy didn't get I might as well: When pronounced in a French accent it sounds like ash.
He sat in his own pew.
Put a peg on it's nose !
Wave a two-ton banana in front of his nose.
I don't know. Identify it, I guess.
A Kid replied: The legs... Because everynight I see my mum's legs up high and screaming "OH GOD! I'M COMING!! XD