Comment by Qem

I'd like to see a study about this, but age-adjusted. I think marriage pays mainly in the long term. It's easier to report you're better single when you still young, healthy, and socializes a lot outside immediate family. As one ages, the balance probably changes. In the extreme case you risk becoming one of these: https://www.bbc.com/news/articles/cwyx6wwp5d5o

I wonder if any differences found by sex are due to age, as it seems men tend to marry older than women, on average.