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For many, infidelity is the nightmare scenario in any relationship. But sadly, statistics suggests that one in five British adults have affairs.

Given cheating is so common yet so devastating, researchers have taken time to understand why people do it.

It is important to note that despite the stereotypes, men and women appear to cheat for largely similar reasons.

A survey of people who were cheating or had recently cheated led by psychologist Julia Omarzu found that "assumptions based on gender may not always hold true".

So, don't automatically assume that a man is cheating to have sex, while a woman wants emotional intimacy. Here are some of the top reasons that people cheat, which can apply to anyone.

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