That Donald Trump, in his quest to lead us back to national greatness, feels free to brag, distort, lampoon, defame and empty his personal trash on every political doorstep is one sign -- but hardly the only one -- of a few changes in America's moral makeup over the past half century. There's also the current dust-up in Dallas, Texas, over the city's alleged inability to block a "sex expo" in the local convention center. The mayor wants to bar the door to "Exxxotica," as the convention calls itself. Various local groups second the motion. "Can't do it," wail officials...