How cool would it be if you couldn't feel pain? A person could jump off of buildings without a parachute and feel nothing. You'd be on top of the WORLD! Well, in all actuality this inherited pain insensitivity could be very dangerous. Pain is the way our bodies alert us to something that is hurt or not quite right; so when this machine is not working correctly, we may be unaware of something that is really hurting us. This is very rare but when it does occur, it is innately planted within us and it doesn't go away. Babies could chew off fingers, toes or have a high fever and not even know it. That would be worrisome to parents!