You’re pretty sure you married a narcissist. In 1959, a psychiatrist named Milton Rokeach ran a strange experiment. He found three men in a state hospital in Ypsilanti, Michigan, who each believed, with total certainty, that he was Jesus Christ. So Rokeach moved all three onto the same ward. Same room, same meals, same group sessions, day after day. His theory was simple. Put three men who each think they’re the center of the universe in one roo…