In this experience report we describe an event using cinema as a way to promote affirmative actions regarding sexual diversity among psychology undergraduates. As undergraduate students, we identify the need of a debate that could overcome the boundaries of the traditional notions of gender, sexuality and desire, in order to rethink what is considered pathological/deviant. Our experience showed that presenting cinema dealing with sexual diversity to our fellow students is not a powerful proposal. We came to the conclusion that this is due to the historical prescriptive context of psychology in southern Brazil. (Contains 1 note.)