"Stop the divorce rate!
DON'T GET MARRIED"
LOL! That's what I was thinking too. Oh my!
In any case, I really do have trouble seeing myself bring children into this world and put them through hell growing up without mummy and daddy together. Hence, I want to be sure of myself. And part of being sure is making my relationship one that even if we split up (emotionally), we would always be friends and know what is healthy for the kids. What's healthy for the kids? We'll put up a smile and raise them together until they hit 18. I know all of this love noise people make, but not everything in life is about "love". Love is arguably a necessary condition, but it's not a sufficient condition. When I have kids, it's time for me to give up some very selfish interests. And this is one of them. It wasn't they who made my decision for which they're a product. They deserve to have both possible worlds.
That said, there's an exception: There are some crazy relationships. If somehow one got involved in a terribly messed up relationship (i.e., argument everyday, fights, verbal or physical abuses) and neither is mature enough to put on a smile and work things together, then it is best they split up. That environment just isn't right for any sane kid. They will pick up the bad habits and even they would wish their parents would split.