How far down does your penis have to go to open a girls virginity?

The hymen is a small tough piece of tissue at the entrance of the vagina and can be broken without ever having intercourse. Some women never realize they had a hymen to begin with - others feel some pain with first intercourse and may have some slight bleeding.

Using tampons may or may not break the hymen as women are all different and the exact placement or shape of the hymen varies. Lack of an intact hymen is not proof a girl has been sexually active.

The hymen can also be broken during some sporting activities, such as swimming, running or biking.