This chapter highlights how ethical norms concerning human sexuality manifest when we explore teaching through different lenses. We present a study which emanates from a conversation in an upper secondary school biology classroom in which students were assigned the task of identifying and discussing taken-for-granted societal norms concerning different aspects of human sexuality. In order to highlight norms present in teaching we use the metaphor of the lens. Thus, by highlighting three depths of fields (DOF) we can zoom in and out on what takes place in different classroom encounters and facilitate a discussion on the ethical implications for research. The first lens focuses on the transactions taking place when each student is given the opportunity to challenge common contemporary assumptions about specific content relating to sexuality and relationships. With the second lens we focus on what happens in the immediate exchanges between the classmates. Finally, the third lens focuses on what becomes visible when highlighting the transactions and exchanges in relation to the historical and societal context within which these take place and what, from a research ethics perspective, becomes important to take into consideration.