my Master and i have had many discussions about pet behavior in part because i am such a wildlife enthusiast and in part because i am *mischievous grin* such a wonderful pet.
All kidding aside, Dom/me and submissive behavior is seen through out the animal kingdom. It is a survival trait. In packs/prides/herds, etc. alpha's, be it male or female, are what they are through a combination of genetics and experience. The same can be said for the submissives. Strong leadership is essential for group survival but the submissiveness to their will is equally important. Even the role of the switch is essential to the mix. The alphas are usually the lead hunters and/or protectors, which is the most dangerous of the activities. Usually their seconds are Dominate to all under them, but for the most part submissive to the alpha’s will. If there is a catastrophe and an alpha is lost, these switches after proving their worthiness will move into the role of the Dominate to ensure the health and continuance of the group. There are of course exceptions, where Dominates come in to the group from without which is usually the case in the prides but even that is a survival trait.... natures way of keeping the group genetically fit.
In the end, we humans are just another part of the animal kingdom which some tend to forget.