The only times I've asked that question is when the girl and I were in a serious relationship and it was part of a "get to know more about you" kind of thing. I couldn't care less if she'd done hundreds of guys.. experience can be a very good thing! :-D
Then why do you ask? I'm not being rude, just wondering why this is a question guys ask...I've never lied, but then, I don't think I've been asked. I've worried over one guy, thought he might ask, but he never did. The only reason I worried, was, oddly enough, I thought he might think I was too inexperienced, not too experienced. lmao
But I can see being in a situation with a guy where he'd ask and I'd be weirded out by it. I mean, why ask? I don't want to know how many women or men a guy has been with, so why do men ask this?