原本指涉男女兩性的sex，在步入20世紀的西方人企圖文明化男女交合的用語時，創造出sex的新意義（性交），由於這個新意義有擴張到男女交合之外的泛性論趨勢，最終又發明了性變態心理與sexuality。Sex的文明化在現代平等的趨勢下出現了非正式化（不守等級秩序老規矩之自在但自制）與性自由的運動，由此促進sexuality的發達與普遍，以致於在公共領域中，生物生理概念的sex越來越讓位於個人－心理與社會－政治概念的sexuality，後者逐漸變成文明化sex的新力量，取代了宗教禮教的舊力量。由此形成sex可能反對sexuality的形勢。

The modern meaning of sex was invented and expanded to cover sodomy and other acts than copulation, and was further civilized in a modernizing West. The incessant expansion of the meaning of sex or pan-sexualism eventually invented the notion of sexuality today. Sexuality is further promoted and universalized when civilizing under the influence of modern value of equality promotes informalization, replacing aristocratic etiquette of sex, and sexual freedom between men and women, gays and straights, so that the biological and physical conception of sex is gradually conceded to the personal-psychological- social-political conception of sexuality. Now sexuality with its “political correctness”, a new form of moralizing, has become a new force of civilizing of sex, replacing religion as the older force of civilizing. The conjuncture of sex against sexuality is thus possibly coming.