Video: Why We Love, Why We Cheat

"Millions of years ago, we evolved three basic drives: a sex drive, romantic love, and attachment to a long-term partner. These circuits are deeply embedded in the human brain." - Helen Fisher

In this fascinating TED talk, anthropologist Helen Fisher describes the evolution of love, the neurochemical foundation behind it, and the essential role in plays in our lives. She also talks about how use of antidepressants affects our brain chemistry and the potentially disastrous implications this might have for our love lives. After you watch the video below, click here to learn more about the neurochemistry of love.

Watch more videos on the science of sex and relationships here.

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Image Source: jcsmilly/

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