Human testes are much larger than one would expect in a truly monogamous primate[1]. Approximately 85% of all human cultures are polygamous and not monogamous[

Human testes are much larger than one would expect in a truly monogamous primate[1]. Approximately 85% of all human cultures are polygamous and not monogamous[2]. 1. Google "Harcourt testes 1981" and read the Nature article. 2. According to the Ethnographic Atlas Codebook, a scholarly catalog of world cultures.