Elevator butt

Elevator Butt The behavior you are referring to is called "elevator butt" or "butt pops," and it's a common reaction for many cats when you pet them at the base of their tail. This behavior is a natural reflex that helps cats to protect themselves and be alert to potential threats. When you touch the base of a cat's tail, it stimulates the nerves located in that area, which then triggers a reflexive response that causes the cat's hindquarters to rise up. This is a natural instinctual response that cats use to prepare for a quick getaway or to protect themselves if they feel threatened. In addition to this reflexive response, cats also have scent glands located near the base of their tail, which they use to mark their territory and communicate with other cats. So, when you pet your cat's tail base, you may also be activating these scent glands, which can cause your cat to lift their tail and expose their hindquarters. Overall, the "butt pops" behavior is a normal and natural reaction for cats, and it's nothing to be concerned about. It's simply your cat's way of responding to touch and communicating with you.