Leave it to scientists to spoil a good thing. They say love is in your head, not your heart. If that's true, then what exactly is love?

Scientists also say love also causes the same chemical reaction in your brain as cocaine. I guess the message is, if you want to get high, don't waste your time and money on drugs, just fall in love. The effects last a lot longer -- for some, a lifetime -- and love is completely legal.

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