In their response to the declaration Fiducia Supplicans, many African bishops used culture as an argument to reject the possibility of blessing same-sex couples. This article probes and shows the extent of the inconsistency of the appeal to culture by the African bishops. It uses the issue of polygamy as a point of contrast: appeals to African culture are never used to justify this widespread practice among Africans or any pastoral flexibility toward it. The article also compares Vatican II’s understanding of culture (Gaudium et Spes) with that of the African bishops. It shows that the African bishops’ understanding of culture tends to be narrow and focused on the past. Finally, the article looks at culture as a source of Christian morals and demonstrates that culture can be only a secondary source.