From what I've seen people who live together and not very loyal. Naturally they still look at themselves as availible because of course there is no commitment. A male friend of mine pointed out that men are not being men these days, they like to play on the computer and play games and do things that are more for youth and don't want to settle-down and take on a wife or kids. It's sad, because marriage is God's plan to bring up a godly household for him to be an example to the next generation. If christians don't want to marry what does that say to sinners?
I've heard sermons on that, that our culture teaches young people to stay in this state of adolescence rather than focusing on teaching them to be men and women.
I can understand if a man is not a believer and hasn't been discipled why he wouldn't want to be married. Feminism has done a number on our culture. It's accepted in society, much of society, that it's okay for a woman to wilfully become a single mother, and raise the kids without a man. You'll hear some women say they don't need a man. There isn't much prestige attached to being a husband or father. Father's are clueless or overbearing and unreasonable in Disney movies, and a lot of other movies, TV shows, and commercials make men out to be kind of clueless, even Christian movies sometimes.
I lived overseas, and in one culture I am familiar with, one of the life goals of a man is to become a father. It's extremely important to them, maybe to an extreme in some cases. But it is good to see that they value being a husband, being a father, being a grandfather, being the head of a family, that sort of thing.