Sex refers to how societies establish social, political, and economic roles based on the biological differentiation of males from females, which translates into assumptions about moral character and value used to justify locating people in categories of domination and subordination. The range of sexual behaviors associated with whom and how a person engages in intimate relationships of love, care, lust, and/or desire, which may include intercourse, remain integral to this process. Throughout much of western political thought, sex, referring to procreation between a man and woman, has provided the foundation upon which people build political community since this act is necessary to reproducing and increasing the number of its members.