This lecture discusses gender and sexuality from an anthropological perspective. It begins with terminology related to kinship systems such as patrilineal, matrilineal, and bilateral. It then examines how different kinship systems shape gender relations and can be either patriarchal or egalitarian. The lecture also distinguishes between sex, gender, and sexuality. It explores examples of gender pluralism and third genders in other cultures and how notions of masculinity and femininity are social and cultural elaborations rather than determined by biology alone.