He has published extensively on the history of gender and sexuality in Africa including Hungochani: The history of a dissident sexuality in southern Africa (2004) and Unspoken Facts: A history of homosexualities in Africa (2007). His latest book, Heterosexual Africa?: The History of an Idea from the Age of Exploration to the Age of AIDS (Ohio University Press, 2008), traces the development of received wisdom about African sexuality back through time in a range of professional discourses including anthropology, psychology, HIV/AIDS epidemiology, and African literature.