Well here goes my 2 cents on this.....
There will always be some degree of topping form the bottom its just they way things are. To think not is foolhardy. Lets look at the relationship as a whole to answer this. First off a dom can not be a dom without a sub. A sub chooses to whom and when she/he submits and even how. Plus face the fact a submissive that doesnt get what she/he wants will not be your submisive for long.....so yes topping form the bottom will always be there in some way. depends on what kind of sub you are dealing with to painsluts/masochists may top form the bottom to get their ass throughly caned...which is what they wanted in the first place..then there are when they break simple rules and know waht the punishment is .. it is about how well you know that specific submissve...yes topping form the bottom exists and goes on to some degree in all relationships