Book excerpt: When it comes to women's priorities, is sex on top? Lack of libido is women's most common sexual problem and once in a secure relationship, women's sex drive begins to plummet. Exploring what our libido is and why it is being depleted, sexual anthropologist Dr Bella Ellwood-Clayton argues that women don't want sex because they don't feel sexy. At a time when women's libidos are being threatened by the wider forces of media, marketing and medication and our increasingly pressured lives, who can blame them? With increasing numbers of women with low libido being diagnosed as 'sexually dysfunctional', the race to create a 'pink Viagra' is on. But do we have unrealistic expectations about our sex drive? Who defines what is normal and abnormal? And could 'low libido' in fact be the natural order of things? Provocative, authoritative and engaging, Sex Drive: In pursuit of female desire is both fascinating reading and a book that is creating passionate debate.