When I was about ten I went to a jumble sale to buy books only to discover that everything that wasn’t a copy of Jaws was by Jackie Collins, Harold Robbins, Sidney Sheldon, or Danielle Steel. Yet if you were a working-class boy in the 1970s, badly written books about fucking – quickly followed in the 1980s by badly written books about shopping-and-fucking – were the kinds of book your mother read, and so, to be fair, did your father, and to be even fairer, 400 million other people. But it’s so much sexier when people don’t have sex on the page. Erotic writing is said to have a noble pedigree: the goings-on in Ovid, the whipping in Sade, the bare-arsed wrestling in Lawrence, the garter-snapping in Anaïs Nin, the wife-swapping in Updike, the arcs of semen hither and yon. W hen it comes to erotic writing, the more explicit it gets – the more heaving, the more panting – the more I want to laugh.