Exposure to pornography is routine among children and young people, with a range of notable and often troubling effects. Particularly among younger children, exposure to pornography may be disturbing or upsetting. Exposure to pornography helps to sustain young people's adherence to sexist and unhealthy notions of sex and relationships. And, especially among boys and young men who are frequent consumers of pornography, including of more violent materials, consumption intensifi es attitudes supportive of sexual coercion and increases their likelihood of perpetrating assault. While children and young people are sexual beings and deserve age-appropriate materials on sex and sexuality, pornography is a poor, and indeed dangerous, sex educator. Copyright © 2009 John Wiley & Sons, Ltd.KEY WORDS: pornography; sexuality; violence; boys C hildren and young people are routinely exposed to pornography. They encounter sexually explicit images while on the Internet, some watch X-rated videos and, like adults, they live in a culture increasingly saturated in sexualised representations. What is the impact among children and young people of exposure to pornography? This article explores the likely effects of children's and young people's exposure to sexually explicit media. It argues that while there are disagreements over how to judge pornography's effects, pornography exposure can lead to emotional disturbance, sexual knowledge and liberalised attitudes, shifts in sexual behaviour, and sexist and objectifying understandings. Particularly for boys and young men, the use of pornography may exacerbate violence-supportive social norms and encourage their participation in sexual abuse.This review focuses on children's and young people's exposure to pornography, rather than children in pornography,