The document summarizes six ideological formations that inhibit the development of radical theory of sex according to Gayle Rubin's "Thinking Sex": 1. Sex essentialism - The idea that sex is determined by biology rather than being a social construct. 2. Sex negativity - Western cultures generally view sex as a dangerous force unless it is for marriage, reproduction or love. 3. The fallacy of misplaced scale - Sexual acts are burdened with excessive significance in Western culture. 4. The hierarchical valuation of sex acts - Modern societies rank sex acts in a hierarchy with married, reproductive sex at the top. 5. Domino theory of sexual peril