Narcissistic behaviour is, at first, attractive to other people. Behaving selfishly seems to bring them a rush of admiration which they get addicted to, while devaluing others when the inevitable rejection comes, covering it up by searching out new people to worship them.
[I'll use this primarily as a guide to dating. Harumph. -Ed.]
Douglas Faneuil is the founder of Living Proof Productions, a not-for-profit devoted to suicide prevention based in New York City. He also designs database solutions for companies throughout the Northeast.