Erick Janssen, PhD, is Professor at and Director of the Institute for Family and Sexuality Studies at the University of Leuven, Belgium, Program Director of this university's Master in Sexology program, and he is a Senior Research Fellow at the Kinsey Institute, Indiana University, USA. He has published extensively on the topics of sexual psychophysiology, sexual aggression, hypersexuality, risky sexual behavior, and sexuality in close relationships. Together with John Bancroft, MD, he developed the Dual Control Model of Sexual Response. He is past President of the International Academy of Sex Research (IASR), the current Chair of the Scientific Committee of the World Association for Sexual Health (WAS), and he has received a number of awards, including twice the Hugo G. Beigel Award and, with his students, the SSTAR Award, IASR Best Student Manuscript Award, and Reiss Theory Award.