"I contend that this is because of a psychological defect in the human species"

Oh, I don't disagree with you. We seem to have no shortage of psychological defects as a species. 100,000 years of evolution and we are still selecting for big breasts and dominating non-cooperative personalities. Fortunately most of our "selection" doesn't actually result in procreation anymore.

Now, about all those "increase your penis size" ads in my spam folder....