Well you can see it that way:
If you're a virgin you still haven't fulfilled your evolutionary purpose...to reproduce. So it means that either you're ugly, and women instinctively don't want to have sex to pass on your genes, or you're in some way retarded and again for the same reason don't want to have sex with you...You should hold out for absolutely no reason except for personal complexes if you in your turn find a female that shows signs that she is fecondable(?) and would be a good raiser (why do you think men instinctively like big tits?)!
Nowadays these traits change form, beauty and intelligence becomes money and power...because they are much more useful in todays society...
I try not to generalise, but that is the norm want it or not...
All the rest about waiting till marriage are religious absurdities left overs, and making sure that the male won't run away after having spoiled the ''goods''. Or again, it's about personal complexes, thinking that once the woman will be married it will be too late to go back!
So if you want to, get laid, do it, do it safely, but there is absolutely no physical or psychological downfall afterwards I can guarantee you that. It's just nature! Plus I agree it's way overrated as an act, it's just a need, and love it's just another trick of nature to make you do it often! Although I'm one of the many people believing that humans are absolutely not monogamous...How else will you spread the good gene the most possible?
That's why I guess now that marriage is not a social obligation everybody gets divorces...
Well...voila, my opinion!