LoonyMel We really need a clearer definition. We must understand if virginity means purity and abstention or just having an intact membrane which relates to sex but not always.
I can understand your approach, and even we share some points, but in general I so not agree with you.
I will not discuss about the social construction about the hymen, it is true, but it is a good construction and quite accurate. It is true that some girls do not lose their hymen when they are deflowered, or more usually do not lose all the membrane, but in general, hymen is teared with it. It is true that some girls can lose it accidentally, but again they are exceptional, not normal.
Hymen is the symbol of purity and even we can not make the symbol more important than purity, (if a virgin is raped, for me she is still virgin), we can not give away all the importance to the symbol.
I know that my opinion is mine and I do not want export it, and I know my opinion is founded in my own feeling and principles and not in an universal science, but my moral makes me value the virginity. I think that a good girl should not have any kind of sex before marriage, and, we came back to the symbol, a girl that touches herself can maintain her hymen intact, but she is not virgin anymore, or maybe, if I am generous I can consider her a "second division" virgin.
It is not science, it is not mathematics, it is only my values.
If you allow me a funny comparison... snooze with a big open mouth, obviously does not harm anyone, does not make bad to environment... and however, I do not like it, and I will not make it ever.