Every woman should be penetrating their vagina themselves to claim their bodies as their own. It is not so easy to tell whether a girl is a virgin, because hymens are so varied. However, it is simply a body part with no clear purpose and no strong predictive qualities of virginity. This depends on many factors, such as how much hymenal tissue a female has, whether her hymen has already been stretched or torn, or how thick and elastic it is. Menstrual blood is able to flow out, but a virginal female may not be able to use tampons.
However, the hymen is much more lethal. Knowledge might empower them to take more control and have more enjoyment but also help limit their risks. Menstrual blood is able to flow out, but a virginal female may not be able to use tampons.