I think we should not ever forget about the mawadda and the rahma that God puts between woman and man. W sort of take for a common place, but when you come to think of it, it is the key.
I spoke I don't kow in which thread, about the man who wwent to a whoerehouse and then married the woman to whom he was client. They ended up having a very good marriage. Forget about education level, and other classical afinities.
My guess is that the man, and the woman, by the same token discovered that mawadda and rahma between them and behaved accordingly.
I also know of quite a number of couples who paper married because she got pregnant. In a way it was forced, but they ended up lasting all their life...
May be it is that as soon as we let that mawadda and rahma rule our relationships, wonders occur.
So may be it is not only what we do before "the marriage", but may be as much what we do after it, whether we react angrily or whether we react with friendship and mercy.
Salaam