Cross-dressing refers to a kind of sexual abnormal behavior that achieves sexual excitement and pleasure by wearing heterosexual clothes. Cross-dressing is a manifestation of sexual perversion, which refers to the act of wearing clothes of the opposite sex according to one's own wishes without violating moral laws. Sexually, transvestites are usually men; In clothing, they usually choose clothes of the opposite sex, such as women's underwear, women's coats, women's pajamas, women's swimwear, women's casual clothes and so on. In terms of sexual orientation, transvestites are usually gay, and a few transvestites are bisexual.