I hate, hate, hate D/s to dog training analogies - but this one struck me...
Our dog is in training - he's not bad, but he's fairly big, and fast, and a teenager (like the other boys around here...), and since he came from a shelter, his history is a bit nebulous.
The trainer explained that he needed two things to be well adjusted and happy and well behaved and all those things we want him to be: control/obedience and fulfillment.
The obedience and control make sense and, even though it remains uneasy for me to talk about, the parallels to D/s are clear.
Fulfillment, apparently, is equally important to maintaining balance and well-being. I'm sure some breeds are fulfilled through their obedience - working breeds, police dogs, guide dogs perhaps. Ours however is a hound - he lives to track and sniff and hunt. Every fiber of his being wants to be nose to the gound running through the underbrush, oblivious to anything or anyone else. The point is that he needs a certain amount of opportunity each day to do exactly what he was literally born to do.
No - people are not bred to roles the way dogs are. But i think the point about fulfillment is just as valid. People, submissive or not, are fulfilled by any number of different things. The control and obedience are not the whole picture. I know - and more importantly, my husband knows that finding and being engaged in the things that fulfill me are essential to my balance and well-being.