" As a group they tend to be more charming than most people," she said. "They have no warm emotions of their own but will study the rest of us. They're the boss or the coworker who likes to make other people jump just for the pleasure of seeing them jump. They're the spouse who marries to look socially normal but inside the marriage shows no love after the initial charm wears off. "

― Jon Ronson , The Psychopath Test: A Journey Through the Madness Industry