America’s bizarre distinctions in how two human appetites are treated — sex and money. Why hotel rooms in liberal cities are so expensive. What did Frank Sinatra/Ava Gardner, Clark Gable/Carole Lombard & Spencer Tracy/Katherine Hepburn have in common? Why are CEO salaries in business "scandalous" but movie & sport star salaries are unworthy of scrutiny? School sex-ed, yes but gun-ed, no? Four revolutions that changed our world.