There must be something in the Potomac— According to a popular adult site, Washington D.C. has won the dubious title of America’s porn capital. D.C. residents reportedly watch almost twice as much online porn per capita as people living in the 50 states. It is a highly charged city, so who are we to judge how people relax? ******.com says D.C. residents watch 14.18 videos per person per year, followed by Hawaiians at 7.5.7 videos per person annually in the No. 2. spot. Other notables include Massachusetts (7.52) and New York (7.5). The Washington Post tries to take a crack...