People, who are married, live on 5-15 years longer than those who are not married, divorced or widowed. But according to German doctors the causation there is reverse: people have partners for life because they are capable of longevity.
That's what the English physician William Farr wrote about this in 1858: "Cretins do not get married, idiots are not married too, outcasts are united but get married seldom. Criminals by birth and upbringing rarely find their spouses. Many hereditary diseases prevent marriages. Those who are beautiful, kind, healthy and have the best chance to live a long life are attractive to the opposite sex".
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