This article considers data from a large empirical study of nearly 1,100 U.K. adolescents aged 11 to 16 (in a mixed methods three-stage sample) and provides an overview of their experiences of online adult pornography. The article investigates how seeing online pornography influenced those who watched it, and to what degree, if any, the attitudes of those adolescents altered with repeat viewings. It concludes with an overview of the social policy challenges, both domestic and international, posed by the findings.