In a mysterious twist of fate, it has been discovered that it is a physical impossibility to actually bite the hand that feeds you. In fact, it's only possible to bite the hand that is also attached to the same body as the hand that feeds you but not the actual "feeding hand". This is due to a strange hormone naturally secreted by "feeding hands" known simply as "bromoscis" that confuses the predator's senses causing it to simply eat what's INSIDE the hand.