The fact that
hymen gets torn only during first insertional intercourse has become a stale story now.
There are number of other activities which can tear the hymen; important and common of them are:
1. Masturbation
2, Cycling
3, Horse riding
4. Tree climbing
5. Heavy, rigorous exercises, particularly athletics
6. Any activities sitting astride
7. Any vaginal examination or procedure by a doctor (iatrogenic)
and many more.
8. Falling astride
You will realize that in modern life-style, many of these activities are carried out by girls before marriage or before first insertional sex.
So intact hymen now-a-days cannot be the sign of virginity.
If you are in doubt and want to confirm whether your hymen is intact or not, you can visualize it in a mirror. Torn hymen shows ragged edges just inside the mouth of the vagina (interoitus).
I hope I have given you a new eyesight to look at this issue.