Can't speak for all guys, but personally I'd definitely prefer them to be a virgin, no doubt about it, I'm Christian which I guess is partly why I think this, but personally a girl who shows restraint and only gets together with a guy when she is in a serious relationship and in the belief that they would spend their life together is great. TBH at 16 if the girl wasn't a virgin it'd be a turn off for me, I think its great for a girl to be a virgin at any age, if they haven't met the right person yet, someone who they intend to be with forever then they should stay a virgin and not just have sex for the heck of it, and I also think the same thinking should apply to guys. (but no-one seems to agree with me)