The main intention of this study, is to explore and understand the social representations of two men and two young women from an upper-middle school around the experience of the body and sexuality, with the purpose to study how is built and shared socially and culturally the common knowledge, from the voice and experience of young people. Guided to this end, the researchers elaborated an in depth semi-structured interview, which sought to inquire from the Theory of Social Representations of Moscovici (cited in Perera, 2003), how young people build along his life path, a knowledge related to the experience of body and sexuality. In addition, was used the technique of Life Stories with the objective to recreate their experience and their line in front of the same, and likewise, seek to make a devolution to visualize the fundamentals aspects that have marked the own subjectivity. Following this, an analysis of the evidence gathered in the light of the theory of social representations in dialogue with different theoretical and conceptual references about sexuality, gender and corporeality from a critical and contextual perspective.