I think that D/s relationships and interactions can be like any other type of attempt at finding "the one" ( or "the many" depending on your preference)...you're going to have those who think about one thing.
Not that Doms shouldn't think of themselves but to me part of being a collared sub is to have a Sir that looks after me, makes sure I am caring for myself so I can better serve Him. He makes sure I'm as well taken care of as He is (if not more because a happy pet is a good pet). A sub can be more demanding than a Dom in some cases because some of us have had such a rough go of life itself or have needs that "just any Dom" can't fulfill.
Like any lifestyle choice (be it religion, philosophy, BDSM, ect...) you'll have your share of snakes and your share of mongooses. It's finding the mongoose(s) that makes it all the better.


admittedly i'm on a rikki tikki tavi kick