This is one of those conversations that makes me break out my personal dictionary... (I say personal because I am the first to argue that putting labels on our roles is difficult. Our defintions may overlap, probably will... and it's around the edges that we could argue for a lifetime... that said...)

I have a lot of trouble understanding switches within the terms 'dominant' and 'submissive'... I think those are very much natural roles... though they can also be learned... or perhaps better to say refined.

I can more easily see and understand switching within the terms 'top' and 'bottom'. Enjoying the physical components of the various roles is understandable to me. But like Russell, I don't seem to have a submissive bone in my psyche and I don't understand how one could switch back and forth between dom and sub.

But just because I don't understand it... doesn't mean I don't recognize that others do understand and/or live it.