All right? He was perplexed by the sexual swellings of certain primates, including chimps and bonobos, because these sexual swellings tend to provoke many males to mate with the females.
Certo? Ele ficou perplexo com a tumescência de certos primatas, incluindo chimpanzés e bonobos, pois essas tumescências sexuais  tendem a incitar os machos a cruzar com as fêmeas.