Men tend to behave better when they're married - both because marriage likely helps improve their behaviour, and nicer men are more likely to be married in the first place, according to a United States study.

They tend to display less anti-social behaviour such as lying, aggression and lack of remorse.

But these traits are also typical of men who cheat on their wives.

Take a look at these personalities and celebrities who famously cheated on their wives, and decide if they are indeed nasty or nice.

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