爱我,真心地爱我(love, love me do).doc

爱我，真心地爱我(Love, love me do)
　　scanning the brains of people in love is also helping to refine science`s grasp of love`s various forms. helen fisher, a researcher at rutgers university, and the author of a new book on love*, suggests it comes in three flavours: lust, romantic love and long-term attachment. there is some overlap but, in essence, these are separate phenomena, with their own emotional and motivational systems, and accompanying chemicals. these systems have evolved to enable, respectively, mating, pair-bonding and parenting.
　　lust, of course, involves a craving for sex. jim pfaus, a psychologist at concordia university, in montreal, says the aftermath of lustful sex is similar to the state induced by taking opiates. a heady mix of chemical changes occurs, including increases in the levels of serotonin, oxytocin, vasopressin and endogenous opioids (the body`s natural equivalent of heroin). “this may serve many functions, to relax the body, induce pleasure and satiety, and perhaps induce bonding to the very features that one has just experienced all this with”, says dr pfaus.
　　then there is attraction, or the state of being in love (what is sometimes known as romantic or obsessive love). this is a refinement of mere lust that al