the major distinction between intercourse (normal) and rape (abnormal) is that the normal happens so often that one cannot get anyone to see anything… - Catharine MacKinnon

Empirically, all pornography is made under conditions of inequality based on sex, overwhelmingly by poor, desperate, homeless, pimped women who were sexually abused as children.

So the idea that there is nothing essential, in the sense that there are no human universals, is dogma. Ask most anyone who is going to be shot at dawn.

Women are socially disadvantaged in controlling sexual access to their bodies through socialization to customs that define a woman's body as for sexual use by men. Sexual access is regularly forced or pressured or routinized beyond denial.