Washington Post reporter Caitlin Dewey’s beat is the Internet. But her big piece on the front page of Wednesday’s Style section is about something broader: “Forsaking monogamy: The evolution of relationships has made affairs less clandestine and less combustive. And of course there are Web sites to help match tryst-seekers.” This being the Post, there is no space for critics of the "evolution" of online adultery Web sites or their users. Dewey promoted the “non-monogamous dating site Open Minded,” where her married female subject, Jessie, advertised, “I’m into building deep and loving relationships that add to the joy and aliveness...