Act of exposing in a public or semi-public context one's suggestive body parts

Exhibitionism is a tendency some people have. These people derive pleasure from the fact that other people can see them naked, or while having sex. Exhibitionism is much more common in extraverts, especially people who have histrionic personality disorder.

Two women displaying their naked bodies at a public event, considered an act of exhibitionism

Exhibitionism is more common in women than in men.

Enjoying watching other people have sex, or being naked, is called voyeurism.