either take the mother's or the father's name. There usually are legal papers and the kids know who their mother and father are.

And how, if the couple is dissatisfied with their relation and split up, is this any worse than when a married couple splits up and divorces when they have kids?

Do you think having kids is a reason to stay together in an unsuccessful relationship?

As a child of divorce (my parents split when I was three), I can tell you that I am at least happy that I didn't have to watch my parents endure a loveless marriage for my sake. I got to see my parents eventually find a positive love relationship with someone they truly wanted to be with.

"Most plain girls are virtuous because of the scarcity of opportunity to be otherwise."
-- Maya Angelou