What is the physical requirement for a male to lose his virginity?
Virginity, to me, is a mental thing with the physical as an accessory, if that makes sense. For example, I once dated a guy who told me he had four years of celibacy, and I told him that its not celibacy if you're just not getting any. Same thing with virginity... a woman or a man could possibly be mentally ready for quite some time before the opportunity presents itself. On the other side of that coin, a woman or a man could be raped before they are mentally ready to deal with the repercussions of penetration and/or intercourse...
Of course, I believe wholeheartedly that rape is not sexual but an exercise of power and control, so rape should not even be considered when it comes to virginity.
When thinking about that... gay men and lesbians... if they never have sex with the opposite gender, are they virgins? Does the act of oral sex cause the loss of virginity?
Why are we so concerned with it, anyway?