translation.en: 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.
translation.zh: 好吧？他对某些灵长类的性器充盈 而感到困惑， 包括黑猩猩和倭黑猩猩， 因为那些充盈的性器倾向于激发 许多雄性跟雌性交配。