05/24/2010 05:12 am ET Updated May 25, 2011

'The Male Brain': Why Do Men Think The Way They Do? (VIDEO)

Why do men act the way they do? In Dr. Louann Brizendine's new book "The Male Brain," which she wrote about today for the Huffington Post, she explains that biology might be behind more than we think.

On Good Morning America this morning, Dr. Brizendine talked about why men are more promiscuous and think about sex more than women do. "The area for sexual pursuit is 2.5 times larger" in men than women, she said, which tells us that this sex drive is biological in nature. However, when asked if this could excuse cheaters like John Edwards and Tiger Woods, she said:

These things are an explanation of the biological underpinnings of the human male brain. It doesn't mean that men don't have to be civilized.