Most of a narcissist's weird behavior - what makes him or her so impossible - is due to the fact that they are committing projective identification against you all the time.
Very weird. Here's a new, short article explaining it on the Main Site.
Projective identification is the result of an interplay between two psychological devices narcissists use.
One is identifying with their reflected image as their self. The fancy name for this mental trick is "introjection." Introjection literally means "throwing inward," which is the opposite of projection, "throwing outward." Introjection is defined as relating to something that comes from the outside as though coming from the inside.
That's precisely what Narcissus is doing in relating to his reflected image as though it's his inner self.
Read the rest here.