Female primates are hard-wired to be promiscuous. In all apes, testicle-weight as a ratio to male body-weight correlates with the frequency of female extra-pair copulations. Remember this scientific principle: The sluttier the females, the bigger the balls.
So where do Homo sapiens females fall on the Slut Scale? Lets check the ball barometer of other apes.
Gorillas have teeny weeny testicles. But they have big shoulders, fangs, and brow ridges. The competition goes on between the big beasts. Sperm can take it easy. Theres no selection pressure for them to compete with other sperm, because nobody has sex with an alpha males female without killing the alpha male. Female gorillas are faithful to the promiscuous alpha male. As a result, gorilla sperm can barely figure out which way to swim. Under the microscope, chimp sperm look like Pattons D-Day, and gorilla sperm look like Hogans Heros. The male gorilla only gets to mate a couple times a year at most, and his teensy testicles are all he needs to get the job done.
The orangutan male-to-testicle ratio is slightly bigger than the gorillas to account for the rare instance of a two-timing female orangutan.
Look at you, you big ape. Yes, Im talking to you, Homo sapiens male. What ornaments do you have to distinguish you from a female? Feeble knuckles, slightly more upper body strength, a beard, an ability to read maps, a refusal to use this ability.
Now look at your testicles. Compared to more monogamous apes, yours are huge.
Like your brain. Which co-evolved to impress the big brains of females, which co-evolved to impress your big brain. Everything big on you, Homo sapiens male, is big by female choice. Your brain is to wow her with your creations. Your oversized penishumongous compared to other apesis to please her sexually. Your balls
well, your balls are just big enough to suggest that while you were out hunting on the savanna, back on the Pleistocene homestead, women were having a ball. And, depressingly for the Homo Sapien male, they still are.
So, in short - there is nothing you can do to stop this natural hard-wired need to cheat in women, save actually catch them at it. Women have evolved strategies to avoid being caught. They are excellent liars. Although they are all unfaithful at some stage, it is only the most incompetent or unlucky ones who get caught. Deal with it and move on - and try to accept that you cannot change 50,000 years of evolution in Homo Sapiens.
[Short, R.V. (1979) Sexual selection and its component parts, somatic and genital selection, as illustrated in man and great apes. Advances in the Study of Behavior 9: 131-158]
[Short, R.V. (1981) Testes weight, body weight, and breeding systems in primates. Nature, 293, 55.]
[Baker, R. and M.A. Bellis. (1995) Human Sperm Competition, Copulation, Masturbation, and Infidelity. Chapman and Hall]
[Buss, D.M. 1994. The Evolution of Desire: Strategies in Human Mating. New York: Basic Books.]
