05/30/2010 05:12 am ET Updated Nov 17, 2011

The Male Brain: More Complex Than You Think

Differences in the way our brains are built shed light on everything from the way we flirt, to the way we fight, to how we raise our boys, argues neuropsychiatrist Dr. Louann Brizendine in her provocative new book, The Male Brain. The author talked to TIME about sex, the daddy brain, and why some men may be built to cheat.

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