Sanderijn van der Doef is a Dutch psychologist, sexologist, trainer and author of best-selling books internationally. She is an international expert and leading authority in the field of sexual health and sexuality education. Clare Bennett researches parent-child sexuality communication and is a senior lecturer at Cardiff University in Wales. She is also a nurse, with a background in sexual health and has extensive experience in working with children and their parents. Arris Lueks has many years' teaching experience and specializes in educating trainee primary school teachers in how to facilitate young children's learning about relationships and sexuality in the Netherlands.