I think in children age, they are not ready to make a family with age condition and menthality. Because they don't know yet about how to survive to themselves. After married and have a baby, make them another priority than themselves. They need to think about money, harmonization, health, education, food, and other things about their family. Build a family is not easy. Our prioritize will not be the same again as like we single. We need to seperate our time to each other. We need to think about "us", not about "me" again. And not only that, two family will join each other to be a big family and it's not easy. Because it may happen when one of our family member not match each other. Different if we focus of ourselves first to make our dreams come true, we can study a lot of thing about the world, we can make a lot of friends and so on.