While folklore has several, and many of them bizarre, theories about how a girl should behave if she is still a virgin, modern proofs of virginity for girls centers around an intact hymen and gynecological examination. Nevertheless there's no way to know for sure if a girl is a virgin. Historical perspective of Virginity testing A person — whether a girl of boy — is said to be a virgin when he or she has not had sexual intercourse. Because of the patriarchal basis of most societies, the concept of virginity in girls came to be laden with notions of purity, honor and worth. Thus, the huge importance of virginity for women was one of the ways of gaining control of the sexual behavior of women.