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Biologist Carin Bondar shares videos and books about animals getting down and dirty.

Mary Roach's 10 Facts About Orgasm

What science knows — and doesn’t — about orgasm.

Sex educator Al Vernacchio shares insights from his classroom “Question Box,” filled with unadulterated queries about how we deal with intimacy.

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Author Christopher Ryan argues that a more nuanced view of sex and monogamy would help us all. An illustrated idea.

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Anthropologist Helen Fisher studies what happens in the brain when we’re in love. Here she gives 10 facts about why we cheat.