Very many people, including not a few Christians, do not find the Christian tradition very helpful for making sense of sex. It is not that people willfully forsake a demanding sexual ethic for a more easygoing worldly one. It is that they often cannot see the point of its demandingness. Thus begins author Adrian Thatchers project of laying out an unashamedly and wholeheartedly liberal approach to sex and sexuality. Fully aware that for some...