anyway how wud you know some1 is chaste ?? its not like you can ask them is it ?? I certainly wouldnt' ask a man, a person's sins is between them and allah, not me, ive no right to ask such a question. btw women can get procedures done to get "fixed "up so even if they werent, really you would never ever know. So theres no real way of telling. As for you saying you'd divorce some1 after, dont you get it ?? you'd be giving the "divorce " label to a woman, & the stigma attached to it.
Well in the cases I know, the men did their homework, they asked men who knew men who maybe knew women and sooner or later the girls and boys who mucked around in their youth are exposed. No one says anything bad to them or their family, but they protect their own child by not letting them marry them.
I have a cousin, she committed sins, many outside of marriage. We are a family tree with many boys, from our grandfather there are 28 children of which 23 are boys. So when a family sees that one of the 5 girls is not married to one of those 23 boys, they can immediately tell why that is. None of my aunties or uncles are stupid enough to marry their sons to this girl. What happens to this girl now you might think? Well she can thank her lucky stars she's still alive, some of us wanted her flogged in the Islamic way, which most likely would have killed her. Others like me wanted her thrown out and completely disowned for the shame she has brought the family.
We also have one boy in the family who commited similar sins, he was beaten to almost an a breathe of losing his life and he is disowned. Rumours spread and people have brains, you find out who are the sinners and who are not. Whilst there is no way to be certain of who is a virgin and who isn't, it definately is no one's business to go exposing these sins. People are well within their right to protect their children and their family from such people. If it means digging for info so be it, so long as you don't expose it.
What has also been proven since, well since as far as time goes back, sooner or later the truth ALWAYS comes out. A girl/boy may act all innocent and pure, but somewhere down the line, maybe 5 years, maybe 10, maybe even 50, the truth comes out. You'll often find the truth is unbearable and often that is the cause of divorce. So isn't it so much easier if people started off marriage with someone of a similar background?