A few weeks ago, psychologist Christopher Ryan wrote a CNN article, "Monogamy Unnatural For Our Sexy Species" in which he says that he considers himself "one of four African great apes." As every zoologist knows, one does not argue with a great  ape--one simply runs.  

However, I couldn't let this article pass without comment.  Mr. Ryan has a new book out in which he claims that human beings have been designed by natural selection to seek "extra-pair copulatory partners"—i.e., having sex with ...