It asserts itself whenever he passes through a doorway or by a chair leg. He can walk straight across a room, but when he nears a doorway, his behind gravitates toward the door frame and is closely followed by his tail. That darn tail likes to wrap around things like walls, chairs, and my arm. No matter how many times I push it away, magnetism pulls it back. Now if only we could harness this irresistible force, we would not need nuclear power.