Faramerz Dabhoiwala in The Guardian:
We believe in sexual freedom. We take it for granted that consenting men and women have the right to do what they like with their bodies. Sex is everywhere in our culture. We love to think and talk about it; we devour news about celebrities' affairs; we produce and consume pornography on an unprecedented scale. We think it wrong that in other cultures its discussion is censured, people suffer for their sexual orientation, women are treated as second-class citizens, or adulterers are put to death. Yet a few centuries ago, our own society was like this too. In the 1600s people were still being executed for adultery in England, Scotland and north America, and across Europe. Everywhere in the west, sex outside marriage was illegal, and the church, the state and ordinary people devoted huge efforts to hunting it down and punishing it. This was a central feature of Christian society, one that had grown steadily in importance since late antiquity. So how and when did our culture change so strikingly? Where does our current outlook come from? The answers lie in one of the great untold stories about the creation of our modern condition.
When I stumbled on the subject, more than a decade ago, I could not believe that such a huge transformation had not been properly understood. But the more I pursued it, the more amazing material I uncovered: the first sexual revolution can be traced in some of the greatest works of literature, art and philosophy ever produced – the novels of Henry Fielding and Jane Austen, the pictures of Reynolds and Hogarth, the writings of Adam Smith, David Hume and John Stuart Mill. And it was played out in the lives of tens of thousands of ordinary men and women, otherwise unnoticed by history, whose trials and punishments for illicit sex are preserved in unpublished judicial records. Most startling of all were my discoveries of private writings, such as the diary of the randy Dutch embassy clerk Lodewijk van der Saan, posted to London in the 1690s; the emotional letters sent to newspapers by countless hopeful and disappointed lovers; and the piles of manuscripts about sexual freedom composed by the great philosopher Jeremy Bentham but left unpublished, to this day, by his literary executors. Once noticed, the effects of this revolution in attitudes and behaviour can be seen everywhere when looking at the 18th, 19th and 20th centuries. It was one of the key shifts from the pre-modern to the modern world.