What does masturbation mean?

Masturbation, referred to as masturbation, used to be called masturbation. Different regions have different slang words, such as masturbation, pipe piling, masturbation, masturbation and so on. (mostly used to describe male masturbation, the latter two are also commonly used to refer to sexual intercourse. ) Because there are many ways to masturbate, and you don't have to use your hands. So some people think that masturbation is not' masturbation' because you don't use your hands, which is a wrong view. Prostitution is a derogatory term in Chinese and a normal sexual behavior. So the correct scientific name should be masturbation.