ABSTRACT Comprehensive Sexuality Education is vital in educating youth about gender and sexuality diversity, and yet there has been a growing debate about including LGBTIQ+ content. Using focus group interviews with 11 cisheterosexual school-attending youth in Cape Town, South Africa, this article considers their accounts of whether and how cisheteronormativity features in their sexuality education curriculum. The participants’ responses are a mixed bag, indicating that while they appear to support their LGBTIQ+ peers and an inclusive sexuality education curriculum, there is little recognition of how cisgender and heterosexual privilege features in schooling. The paper concludes that cisheteronormative structures, discourses, and practices have deep roots that mediate and continue to shape the teaching and learning of sexuality education, ensuring that schools remain as normative spaces that enable just straight bodies to extend into them.