The reason why cats’ hands must be on top may be because cats are animals that need to run suddenly and jump frequently, and the space above their paws is important to them.

Furthermore, the cat's spiny claws are usually retracted into the sheath, but when attacking, they will thrust forward, and the cat's claws will touch the ground. The direction of the claw sheath is also upward or forward. If a cat's claws are pressed, it will feel insecure, which makes it feel very scared. Therefore, the cat's claws must be in a state without any pressure, that is, "the cat's claws must be on top."