Snake

Having arrived at the edge of the river, the fisherman soon realized that he had forgotten to bring any bait.  Just then he happened to see a little snake passing by who had caught a worm.  The fisherman snatched up the snake and robbed him of his worm.  Feeling sorry for the little snake with no lunch, he snatched him up again and poured a little beer down his throat.  Then he went about his fishing.  An hour or so later, the fisherman felt a tug at his pant leg.  Looking down, he saw the same snake with three more worms in his mouth. . .