Why should the cat's tail be cut off?

My grandmother asked me to take a piece from the cat's tail. First of all, it is to make cats less slender. If the tail tip is not removed, the cat's tail will become very long. The cat seems very thin. Removing a small piece will prevent the tail from growing too long and prevent the cat from absorbing nutrients. Second, it is superstition. However, my grandmother removed the tip of the cat's tail mainly to make it look better when it grows up. Indeed, after removing the tail tip, my cat's tail is not as long as other cats, and it looks even and firm as a whole ~ ~ ~