I loved STRANGER IN A STRANGE LAND. Of course, sexual monogamy isn’t natural for humans or most other mammals. And it’s not only men who enjoy multiple partners. It’s just that for thousands of years, men and other women have severely punished women who “stray,” so we mainly keep it on the QT. But the times are a’changing, the pussycat is out of the bag, and more and more men are acknowledging how turned on they get from their wives being with other partners, partly due to a phenomenon of evolutionary biology which I wrote about it in SPERM WARS: http://drsusanblockinstitute.com/sperm-wars
Susan M. Block, Ph.D.
The Dr. Susan Block Institute