He dates his other sister.
A small medium at large.
A COW-asaki MOO-torcycle!
Kick his sister in the jaw.
Mitosis!
Both of their eggs have sell-by dates.
Because he couldn't find a date!
Because if they are they'll tell you, and if they aren't you don't want to insult them.
He couldn't think of anything, and said "I'll mullet over"
It's the space between girlfriend and girl friend.