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Why do people crave sex?

Dr. Michael Roizen, MD
Internal Medicine

While you may think that the biggest sex organ of all is one that's covered up by the latest style from Jockey or Victoria's Secret, your brain is actually your biggest sex organ. Sexual thoughts, for example, go through a man's brain every 52 seconds, and through a woman's only once a day. Perhaps that's because men have 2.5 times the amount of brain space devoted to sexual drive than women do (or because women have more important things to think about?). The craving for sex originates in a part of the left brain called the insula. This primitive area of the brain is especially active in women who have more frequent orgasms.

You: Being Beautiful - The Owner's Manual to Inner and Outer Beauty

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You: Being Beautiful - The Owner's Manual to Inner and Outer Beauty

Most people think that beauty revolves around such things as lipstick, sweet eyes, or skinny jeans -- all those things that we can see (and obsess over) in the mirror. But the fact is that beauty...

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