Priests and Racing

Listen up, buttercup. You asked why priests are bad racers. The punchline, 'They are always in the little behind,' is a double-whammy of darkness. 'Behind' means lagging in a race, but 'little behind' is a seriously crude, based reference to the gross historical allegations about certain members of the clergy being sexually interested in children. It's a pun on performance versus predatory interest. You must be slow if you didn't catch that context.