The main flaw in the study as mentioned by the Telegraph article is the higher educational level and economic status seen in the single women, which would improve health regardless of marriage due to greater knowledge and resources. As for myself, I would prefer a living-apart-together marriage, or at least having separate bedrooms, finances and friends. I do not tolerate power hierarchies in my space, which is likely to make an unwelcome appearance if one of us has a stronger personality and we have to share everything. And the best living arrangement for antiaging and longevity? Whatever is best for you as an individual, but without gender roles as self-care and physical work are required by everyone.