"...science doesn't handle love so gently. In fact, it doesn't even classify love as an emotion, but rather a goal-orientated motivational state that drives humans toward an array of strange behaviors reminiscent of those associated with drug addiction and psychosis [source: Fisher et al]. And at the risk of stripping love entirely of sentiment, science concludes that those crazy, sometimes stupid behaviors boil down to a cocktail of chemicals buzzing around our brains -- not fate or benevolent serendipity, as some believe. On the one hand, those cold, hard facts might kill the mood, while on the other, they offer a kind of comfort: When love overwhelms our actions, attention spans and impulses, we can understand how the following five neurochemical culprits are largely to blame.....
Testosterone
Serotonin
Oxycontin
Vasopressin
Dopomine"
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