Ric - If you don't really know the answer to the question, it just makes it confusing when you reply to them. Just wait until someone who does know can answer.
Xphy - Yes, they do have marriage. Pretty standard marriage with all the bonds and commitment expected of that. Some couples, if unable to have children, will see about sleeping with other people for the sake of having a child they will then adopt. But that is done with the knowledge and consent of everyone involved and generally with the help of the church. Affairs are considered bad taste and grounds for a woman to leave her husband if she finds him cheating. Men can't divorce their wives and are traditionally expected to look the other way if their wife cheats on them, but that, obviously, varies person to person xD
Premarital sex isn't frowned on at all. They expect people to be discrete about it and most people will pretend it isn't really happening out of politeness. If children result, that is a wonderful thing and there is no stigma attached. Woman that have children already are considered fertile and highly sought after as wives.
