Abstract
Based on a case study with female and male students, this research explores the rationalities surrounding sexual behaviors of a group of students in San Cristóbal de Las Casas, Chiapas, using mixed qualitative and quantitative methodology with questionnaires and focal groups as analytic tools. The find-ings show that the notion of equality is a modern logic that underlies sexual openness for women and responsible sexual participation for both sexes. These values are difficult to navigate in a context in which traditional gender norms establish sanctions for women who have practiced sexual openness, based on stigmatizing and criminalizing those who have unplanned pregnancies and abortions.