“So, apparently, I’m a postmodern fantasy writer. I think this is because I’ve got a condom factory in Anhk-Morpork. Admittedly, the troll that does all the packing wonders what the women are laughing about when he is packing the ‘Big Boys’. But you cannot imagine a condom machine in Middle-earth. Well, actually, I can, regrettably. But you certainly can’t imagine one in Narnia, and nor should you. But the curious thing is that Ankh-Morpork can survive this. Ankh-Morpork does survive most things.”
–from page 68 of Terry Pratchett’s A Slip of the Keyboard