Marriage has gone through profound changes over the last five decades, but we continue to speak about it as though it's the same old familiar pattern. To see how much has changed; I am going to look at the shift from the forties, to the sixties, to today. In 1968, less than a year after the famous Summer of Love, as they used to say out in the country, "The times they were a-changing." The sexual revolution, Viet Nam, drugs--the youth of the day were convinced the world would never be the same again. Yet they didn't think about how such changes would affect marriage. …