I Am Fascinated By Human Behavior

Why do people typically want to have kids? I'm guessing because they think they'll enjoy raising children, or in a lot of cases people have kids simply because they think it's a natural part of marriage. I don't count the people who have kids simply by accident. I honestly don't want to bring a child into this very hard,cruel world. Life sucks in a lot of ways. Why bring a child into it so they can suffer with you? Kids don't ask to be brought into this world so it seems very selfish to drag them into it so they can cope with life's harshness. And no life doesn't suck all the time. It does have its good points.