The issue of the protection and shape of marriage as well as sexual andgender identity of a human being is the subject of a lively public debate, including political and media debate. Most often, it lacks reliable arguments of a legal nature, and above all sociological, as well as psychological and philosophical. In fact, it is not possible to answer the questions arising from gender reassignment, same-sex marriage, early sexualization of children, or conversion therapy without invoking authentic data and a multifacetedexplanation of complex problems that even the best lawyer is often unable to answer.In order to properly resolve the above important questions concerning the human being, his or her well-being, dignity, influence on other individuals and participation in society, it is necessary to have appropriate instruments in the field of various sciences and philosophies. That is why it is necessary to use the knowledge of specialists in many fields. This issue is crucial for theoutcome of proceedings conducted by the courts, which have the power to establish or define in a binding way the specific social relationships that are legal relationships.

EXCERPT FROM THE INTRODUCTION