There's a lone genius—possibly evil and certainly entrepreneurial—behind Ashley Madison. His name is Noel Biderman, and he's the chief executive officer of Avid Life Media, based in Toronto. "Monogamy, in my opinion, is a failed experiment," he declares. It's unclear if Biderman actually believes this—he's married and has two young kids—but like Hugh Hefner before him the business he has created pretty much requires that he say it. Behind his desk, in an office so lacking in embellishment it almost looks like a hastily assembled low-budget film set, is a large flat-screen monitor promoting his company's flagship brand. It reads: "Life is short. Have an affair."