Loose Chimpanzee or Loyal Red Fox?

“Are we biologically inclined to couple for life?” asks a Scientific American reader. “[H]umans are in general innately inclined toward nonmonogamy,” says psychologist David M. Buss, by way of writer and instructor Jeannine Callea Stamatakis. Although “promiscuity is not a universal phenomenon,” and fun questions like “tell me about your wedding day” can apparently help predict whether couples will stay together or not. (Although staying together and nonmonogamy are obviously not mutually exclusive.)