I think that we need a definition of virginity, and i do believe that you loose your virginity at the same moment you have intercourse with someone of the opposite sex...
Actually there really isn't a good definition of virginity.
If you define it as only intercourse then a girl who appears in porno films doing only bj and anal scenes with a 100 guys would still be a virgin.
On the other hand, if you define it as masturbation then nobody's a virgin.
So, in the end, it's really a meaningless label.