One of my central contentions as a centrist is that we can and should make a distinction between the good and the tolerable. Many people want to follow the common, traditional, normal path for themselves, but tolerate other paths for other people.
One encouraging piece of evidence for this contention comes from the views of teenagers reported in The State of Our Unions 2009. When asked if they thought that most people will have fuller and happier lives if they choose legal marriage rather than staying single or just living with someone, almost forty percent of girls and a third of boys said yes. This proportion has been rising.
At the same time, when these teens were asked whether having a child out of wedlock is "experimenting with a worthwhile lifestyle or not affecting anyone else," just over half of girls and boys said yes. These proportions have also been rising.
Now, I think the majority of teens are wrong in thinking that having a child out of wedlock doesn't affect anyone else. And I would strongly counsel anyone not to experiment with that lifestyle.
My point is that most teens are willing to accept experiments with unusual family practices, even as they themselves increasingly think that most people would be happier making families the traditional way. We do not have to make all ethical decisions based on what we ourselves do or want. We can choose for ourselves the way that we thinks works best for most people, while tolerating other practices in society.