Scientific insight and expert advice on behavior, personality traits and why we act how we do.
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How much sex do you need to be happy?

Most people believe more sex equals greater happiness, but a study found there is a magic number when it comes to sex among committed couples.


8 reasons why people cheat

Infidelity is costly — it can lead to tears, break-ups, divorces and even violence. So why do people do it?

Behavior Video