I'm a 23 year old virgin male that has been dating a girl seriously for about a year. We are talking seriously about marriage and I think that things are definantly headed in that direction. In order to protect myself against STDs; I asked about her sexual background. At first, there was a lot of hesitation to answer the question. However, I was paticient and she could tell that this was important for me to know. She finally gave me an answer. She said that she was a virgin, even though her hymen may not still be there. She said her hymen is no longer there because she is very active and rides mountian bikes, uses tampons and therfore it is not there. Can this be true? I know she had a wild spell in college. Do I need to dig deeper? Something doesn't feel/sound right. I need your medical opinion if a hymen can be torn by being active and riding bikes.