Meg-John Barker is the author of a number of popular books on sex, gender, and relationships, including Queer: A Graphic History, Gender: A Graphic Guide, How To Understand Your Gender, Life Isn't Binary, Enjoy Sex (How, When, and IF You Want To), Rewriting the Rules, The Psychology of Sex, and The Secrets of Enduring Love. They have also written a number of books for scholars and counsellors on these topics, drawing on their own research and therapeutic practice. Websites: rewriting-the-rules.com, megjohnandjustin.com. Twitter: @megjohnbarker, Instagram: @meg_john_barker. Andreas Vossler is Director of the Foundation Degree in Counselling and Senior Lecturer in Psychology at the Open University. He is also a systemic trained couple and family psychotherapist. His current research activities focus on therapeutic work with couples and families, infidelity, Internet infidelity, and counselling and psychotherapy. Andreas is co-editor of the Counselling and Psychotherapy Research Handbook (2014) and Understanding Counselling and Psychotherapy (2010; both Sage). He has authored three textbooks and published 17 book chapters and 19 articles in peer-reviewed papers on topics related to counselling and psychotherapy (family therapy, infidelity, online counselling, health psychology, psychiatry) and research methods. Andreas is on the editorial board of Counselling Psychology Quarterly and Forum Community-Psychology.