“The brain scans and mood swings of an infatuated lover, scientists have recently discovered, look remarkably similar to the brain scans and mood swings of a cocaine addict— and not surprisingly, as it turns out, because infatuation is an addiction, with measurable chemical effects on the brain. As the anthropologist and infatuation expert Dr. Helen Fisher has explained, infatuated lovers, just like any junkie, “will go to unhealthy, humiliating, and even physically dangerous lengths to procure their narcotic.”