I was having a discussion with someone about life in Korea–someone who feels pretty much like I do about it–and something interesting crossed my mind. It’s the concept of “normal marital sadism” that was coined by the therapist David Schnarch to describe the very common form of emotional sadism that seems to develop in a lot–a lot–of marriages. He published an article on the concept back in May of this year, in Psychology Today: People who refuse to acknowledge their own hatred, vindictiveness, and punitiveness are the most pernicious people to those they love. You can’t learn to control hostile impulses you …