Masturbation
Masturbation is when a person touches his or her own sex organs to gain pleasure. It often results in an orgasm. Although some religions say it is bad, the modern view is that it is a completely normal and healthy thing to do. Almost all boys and most girls masturbate, starting in puberty if not earlier. Both teenage boys and girls masturbate daily on average for mid-teens according to one survey. Studies have shown that many people, including adults with sex partners, masturbate regularly. There are many slang words and expressions for masturbation. Among the most common, at least in the United States and Canada, are: jacking, jacking off and jerking off. Those are usually just used for males and are definitely slang. A teenage boy might say, "I've got to jack." Some words or expressions can be for anyone and are reasonably polite: playing with yourself, touching yourself, pleasuring yourself, self pleasure and solo sex. Those expressions might be used on TV or radio talk shows. In comics, the words fap fap fap mean the person is masturbating (but there's not a picture showing it.)