" It was about malignant narcissism—a particularly sinister type of narcissistic personality disorder (NPD). A malignant narcissist sucks a victim in by mirroring her (“I thought I’d found my soul mate,” survivors recall): this is the honeymoon period. Once the victim’s hooked, the narcissist vampire feeds off her for his own “supply” until he inevitably finds another victim who he believes is a better source. Once victim number one is devalued in his mind, the malignant narcissist is free to drop the angelic act and to openly degrade and exploit her—and in doing so, reveals himself as the greedy, destructive, aggressive and sadistic predator he truly is. Omigod "

― Cat Marnell , How to Murder Your Life