Does anyone here honestly believe that if a person has been in a serious loving relationship, and that relationship ends - that it will be as nothing just because they didn't have sex? So I don't get this whole "preserving yourself for the one" concept.
The only way ensure this whole "only one" idea would be to only start to be in love with a person after marrying them, or to always end serious relationships in marriage. That is too much to expect of human beings. We don't always know how things are going to turn out, and the cost of such a life decision (eg: marrying someone it turns out you dislike) would surely outweigh any romantic benefit.
Sex isn't the reason people who have previously been in a serious relationship aren't an empty vessel for their partner when they get married, love is. I presume that that is the romantic (all to meee! only ever loved meee!) ideal that people are chasing with this, and I'm saying even if someone is a virgin, that is no guarantee that you're the only person they have loved, or that they haven't had as equally powerful relationship with someone else than if they had had sex.
I don't know if anyone will get what I'm saying here...
Remaining a virgin until you feel comfortable having sex, or like a person enough to have sex is a different matter. Holding onto virginity as though it equals exclusivity in love.. is imo naive.