This paper deals with the topic of human sexuality in the light of anthropology and the theology of the body by John Paul 2nd. Biblical reports present sexuality as Gods gift and an important determinant of human ability for relations. Following that, John Paul the 2nd brought speech about body focusing on sex difference when it comes to affiliation. Since the creation, human being was created in two different sexes and for life group of people. With that, it opposes to sexual revolution which brings new speech about body being opposed on the basis of sex and gender. In the second part of this paper, biological category of sex and social category of gender are being examined within queer theory. Some of the representatives of queer theory are John Money, Michel Focault, Judith Batler and Simone de Beauvior. They think that in defining gender identity sex does not have an important part because gender is developed through socialization and life experience. In the queer theory, reflection of sex theory in politics and society is being elaborated. In the politics of the United Nations and the European Union it is believed that every form of gender determination, whether it is heterosexual, homosexual or transsexual, should be equally treated in the society because they are the product of socialization and human choice, and not of sex. Finally, one can find the answer of the Church to some scientific settings of gender ideology and its implementation and conduction in the law. In the light of biblical anthropology, church tradition shows that it is not acceptable to reduce biological category of sex to some minimum and it is not acceptable to emphasize cultural dimension beyond measure.