I think a great many marriages would be saved if people would behave toward one another with the same courtesy that they would extend to someone whom they really didn't know as well as a marriage necessarily implies. ... It's not very easy to do, but it is surely easier to do than to haggle and nag and fight and bitch and yelp at one another as you hear a lot of married people doing ... They seem to feel that the familiarity of affection permits anything, including insult.