A good man/woman will increase and help you multiply the resources you have, a bad man/woman will diminish your resources. This is why choosing should be done carefully.
Before marriage, we have to stay in courtship and get used to each other, this will help a lot in our marriage, because by then you would have been used to the kind of partner you're living with, nothing about their character would be strange to us, because we are going to enjoy each other after getting used to one another, this must also not be vested on one side alone, everyone is concerned in taking responsibility for each other and know the kind of partner they have right before marriage.
This is the most sensible way of looking at things, which is actually very rare in the relationships of young people.
We will not describe situations where an unwanted pregnancy occurs, because there are plenty of such cases, and it turns out to be a somewhat hopeless situation, when the partners have no choice but to accept each other.
But what surprises me most is when two partners, free from everything, do not want to get to know each other as soon as possible: their habits, attitudes to money, attitudes to work. They just run to the registry office to sign.