double income no kids means that couples don't want children and don't have children. It's a lifetime when two people are so dependent on each other.

When double income no kids gets old, this can mean that relatives will take care of them, or they can take some adopted sons as their daughters. Or simply go to the welfare home to collect orphans, which is ok.

Maybe when double income no kids was young, he didn't think it was bad to have no children. He felt particularly free and free, but once he was old, especially when his other half died, he was left alone, and he felt particularly lonely. Maybe some people will regret being double income no kids. In fact, when he is old, he can be taken care of by his relatives' children, such as his nephew and nephew.