It’s well known that marriage is an important factor in longevity. But maybe we’ve been interpreting that wrong, or, at least, not optimising.
From the Gerontology Research Group article on the current oldest living person, Italian Emma Morano:
In 1926, Mrs. Morano was married to Giovanni Martinuzzi, a marriage she would rather not talk about… Having separated – but not divorced – from her husband in 1938, Mrs. Morano has lived alone ever since, and accredits this as one of the key secrets to her longevity.
Common Infirmities 