There are several reasons why fans of BBC’s Sherlock are utterly mad, incurably creative, and horny as hell. First and foremost, they are hungry. Devotees of American TV dramas get twenty-two episodes a year. Fans of most British drams enjoy six, eight, maybe a dozen. The Sherlock fandom gets three. The Sherlock fandom gets three television episodes every 18-24 months. The Sherlock fandom is deeply, abidingly, and very inventively starving.
— Anne Jamison, Fic: Why Fanfiction is Taking Over the World.