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The brain in love triggers neurochemical reactions for infatuation, lust and attachment. Too often, however, those phases are followed by boredom, irritability, heartache, the urge to self-medicate with drugs or alcohol--and attraction to new potential mates. Robinson's latest book, Cupid's Poisoned Arrow, zeroes in on this untold part of the story: how and why biology dissolves our romances, and what we can do about it. The part of the brain where we fall in love is also where we fall out of love. Learn the subconscious signals that make it easier to enjoy lasting harmony.