Answer: Well, there is no such thing as eating yourself because everything we eat must be digested, so if we eat even our stomach, that will not be possible to digest.
Explanation: But, if that were possible, we would just disappear completely and you would die. Your whole body consists of your heart, brain, lungs, and other body parts, and if you were to eat them, or just one of them, you would die either automatically or sometime later.