Based on 22 qualitative interviews the article deals with Brazilian Catholic women between 20 and 60 years old from the Sao Paulo who suffered from contradictions of personal sexual experiences and their former catholic socialization. More precisely, the focus of the analysis is the conflict between the values and patterns proposed by the Catholic Church regarding sexual behavior and the sexual praxis supported by the life conditions in the modern culture of Brazil’s biggest city. In reference to five major topics, i.e., birth control, abortion, extramarital sexual relations, divorce and artificial fecundation, the article investigates of how these women experienced a metamorphosis of identity in their adult sexual life.