BrainSex -- Why We Fall In Love, is an interesting documentary about the science and natural findings as to why humans fall in love. For centuries, love has been celebrated -- and probed -- mostly by poets, artists, and balladeers. But now, its mysteries are also yielding to the tools of science, including modern brain scanning machines. A handful of young people who had just fallen madly in love volunteered to have their brains scanned to see what areas were active when they looked at a picture of their sweetheart. The brain areas that lit up were precisely those known to be rich in a powerful feel good chemical, dopamine -- the substance that brain cells release in response to cocaine and nicotine.
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