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...