Book excerpt: What can psychology teach us about sex? How do different bodies and brains respond sexually? How can we prevent people being stigmatised for their sexuality? The Psychology of Sex takes you on a tour through the different ways that psychologists have created and sustained certain understandings of sex and sexuality. Bearing in mind the subjective nature of sex, the book explores cultural concerns around sexualisation, pornography, and sex addiction, as well as drawing on research from sexual communities and the applied area of sex therapy. When so much of our relationship to sex happens in the mind, The Psychology of Sex shows us how important it is to understand where our ideas about sex come from.