Why do people masturbate?
It feels good and is relaxing.
It’s a good way to learn to know your own body. You discover what your vulva or penis looks like, how it changes when you get excited and how your genitals feel and smell.
You can learn what kind of stimulation you need to get excited and be able to climax.
It’s a good preparation for sex. When your lover asks what you like or don’t want it’s not hard to answer.
By masturbating you gather general information about sex, like your climax becoming stronger when you postpone coming or that your sexual preferences may change from one day to the next.