created within this exchange of women by men in a kinship system. Women are born biologically female, but only become gendered when the distinction between male giver and female gift is made within this exchange. For men, giving the gift of a daughter or a sister to another man for the purpose of matrimony allows for the formation of kinship ties between two men and the transfer of "sexual access, genealogical statuses, lineage names and ancestors, rights and people" to occur. When using a Marxist analysis of capitalism within this sex/gender system, the exclusion of women from the system of exchange establishes men as the capitalists and women as their commodities fit for exchange. She ultimately hopes for an "androgynous and genderless" society in which sexual difference has no socially constructed and hierarchical meaning. "Thinking Sex" In her 1984 essay "Thinking Sex", Rubin interrogated the value system that social groups—whether left- or right-wing, feminist or patriarchal—attribute to sexuality which defines some behaviours as good/natural and others (such as pedophilia) as bad/unnatural. In this essay she introduced the idea of the "Charmed Circle" of sexuality, that sexuality that was privileged by society was inside of it, while all other sexuality was outside of, and in opposition to it. The binaries of this "charmed circle" include couple/alone or in groups, monogamous/promiscuous, same generation/cross-generational, and bodies only/with manufactured objects. The "Charmed Circle" speaks to the idea that there is a hierarchical valuation of sex acts. In this essay, Rubin also discusses a number of ideological formations that permeate sexual views. The most important is sex negativity, in which Western cultures consider sex to be a dangerous, destructive force. If marriage, reproduction, or love are not involved, almost all sexual behavior is considered bad. Related to sex negativity is the fallacy of the misplaced scale. Rubin explains how sex acts are troubled by an excess of significance. Rubin's discussion of all of these models assumes a domino theory of sexual peril. People feel a need to draw a line between good and bad sex as they see it standing between sexual order and chaos. There is a fear that if certain aspects of "bad" sex are allowed to move across the line, unspeakable acts will move across as well. One of the most prevalent ideas about sex is that there is one proper way to do it. Society lacks a concept of benign sexual