What does it mean to be a man in our biomedical day and age? Through ethnographic explorations of the everyday lives of Danish sperm donors, Being a Sperm Donor explores how masculinity and sexuality are reconfigured in a time in which the norms and logics of (reproductive) biomedicine have become ordinary. It investigates men s moral reasoning regarding donation, their handling of transgressive experiences at the sperm bank, and their negotiations of gender, sexuality, intimacy, and relatedness, showing how the socio-cultural and political dimensions of (reproductive) biomedicine become intertwined with men s intimate sense of self.