I tend to think that much of the feminist agenda is more invested in the culture of groundless autonomy and sexual Darwinism than it is in genuinely uplifting women. Of course, virginity is a battle against sexual temptation, and popular culture always opts for the easy way out instead of the character-building struggle. The result is superficial women formed by meaningless choices, worthy of stereotype, rather than laudable women of character, worthy of respect. Perhaps virginity seems a bit cold, even haughty and heartless. But virginity hardly has exclusive claim on those defects, if it has any claim at all.
Promiscuity offers a significantly worse fate.
I have a very dear friend who, sadly, is more worldly-wise than I am. By libertine feminist standards she ought to be proud of her conquests and ready for more, but frequently she isn't. The most telling insight about the shambles of her heart came to me once in a phone conversation when we were speculating about our futures. Generally they are filled with exotic travel and adventure and PhDs. This time, however, they were not.