Sex sells. It’s older than Adam and Eve. Whisper it, before the internet, people had sex and were even naked together, sometime even at the same time, in the same room, without a phone. Hallie Rubenhold has turned a Ph.D. into an international bestselling book of non-fiction (which we used to call factual) based on a list of prostitutes that sold their bodies around the Covent Garden region of London. Her parameters of study were centred on a...