I'll present a couple of options, maybe combining elements. The user can choose based on their specific focus.
Alternatively, focus on identity or child development: "Exploring Identity and Body Perception in FKK: The Role of Bilder of Kinder in Shaping Self-Image". Fkk Kinder Bilder
Perhaps structure the title to highlight both cultural and psychological aspects: "FKK and Child Development: The Role of Visual Culture in Shaping Attitudes Toward the Human Body". I'll present a couple of options, maybe combining elements