Do you know ghouls from goblins and ghosts?
exhibitionism ex·hi·bi·tion·ism (ěk'sə-bĭsh'ə-nĭz'əm)
An abnormal compulsion to expose the genitals with the intent of provoking sexual interest in the viewer.
derivation of sexual gratification through compulsive display of one's genitals. Like voyeurism (q.v.), sexual display is almost universal as a prelude to sexual activity in animals, including humans; it is regarded as deviant behaviour when it takes place outside the context of intimate sexual relations. Exhibitionists are usually not dangerous, although the experience is frequently perceived by the victim as threatening; violence or sexual assault seldom follows the display