You all remember my journal about disturbing fetishes only two posts ago? Well, I'm going to elaborate on that.
First, let me explain how I believe a fetish works, and to do so I will tell you how the human brain works, to an extent.
At its most base level, the human brain is first and foremost interested in staying alive, and breeding so that there are future generations that will survive. Therefore, in the time of cavemen, it was the biggest, strongest of the men and the most fertile of the women who were most important for satisfying this breeding desire because the man needed to be strong and the woman needed to be able to have many children.
Why is being physically fit in this day and age so prized? Why do we look so much to physical prowess and attractiveness? Because that is how our brains are programmed. Foregoing technology, the human brain is programmed to breed with a person who is likely to produce offspring who will survive. That fact is still in our minds.