Sexuality and contemporary sexual practices in the genealogy of the ethical subject of Michel Foucault. Resumen La obra de Michel Foucault en sus tres momentos; la arqueologia del saber, la genealogia del poder y la genealogia del sujeto etico, permiten pensar la sexualidad ya no como naturaleza humana sino como invento y construccion moderna que parte de discursos sociales, religiosos, politicos y cientificos consolidandose en un dispositivo dinamico en el que esta implicado el juego de los saberes, del poder, la verdad y el placer. A este respecto la obra de Foucault permite hacer una reflexion sobre los procesos de subjetivacion que se dan en una sociedad occidental y capitalista, en el proyecto de globalizacion y homogeneizacion. Palabras claves: Michel Foucault, arqueologia, saber, genealogia, poder, sujeto, etica, sexualidad, discurso, dispositivo, verdad, placer, subjetivacion, capitalismo, globalizacion, homogeneizacion. Abstract Michel Foucault's work in its three moments; the archaeology of knowledge, the genealogy of the power and the genealogy of the ethical subject, they allow to think the sexuality not as human nature but as invention and modern construction that departs from social, religious, political and scientific speeches being consolidated in a dynamic device in which this one implied the game of the knowledge, of the power, the truth and the pleasure. In this regard Foucault's work allows to do a reflection on the processes of subjetivation that are made in a western and capitalist society, in the project of globalization and homogenization. Key words: Michel Foucault, archaeology, knowledge, genealogy, power, subject, ethical, sexuality, speech, device, truth, pleasure, subjetivation, capitalist, globalization, homogenization