Narcissism is a factor in trait theory used in various self-report inventories of personality such as the Millon Clinical Multiaxial Inventory. It is one of the three dark triadic personality traits (the others being psychopathy and Machiavellianism). Except in the sense of primary narcissism or healthy self-love, narcissism is usually considered a problem in a person's or group's relationships with self and others. Narcissism is not the same as egocentrism. The term "narcissism" comes from the Greek myth about Narcissus (, ""), a handsome Greek youth who, according to Ovid, rejected the desperate advances of the nymph Echo. This caused Narcissus
Narcissus (mythology) all the pain he provoked. Narcissus walked by a pool of water and decided to drink some. He saw his reflection, became entranced by it, and killed himself because he could not have his object of desire. A century later the travel writer Pausanias recorded a novel variant of the story, in which Narcissus falls in love with his twin sister rather than himself ("Guide to Greece", 9.31.7). In all versions, his body disappears and all that is left is a narcissus flower. In 1898 Havelock Ellis, an English sexologist, used the term "narcissus-like" in reference to excessive masturbation, whereby