As someone that's done the co-habitation thing, I can see both sides of the issue. It's most likely a far healthier lifestyle emotionally to not do it for long, if at all.
The whole thing is quite complicated to me. I'm not sure it's necessary to remain a virgin until marriage, or even if that's best. However, I do think that it's probably best to get married ASAP if you're going to be living together.
you sure you meant to post that specifically to me? :) because i'm agressively against cohabitation