Seems like common sence phycology 101 to me, that regardless of titular distinctions people change their "behavior" assuming more dominant or submissive postures accordingly depending upon a wide variety of parameters pertinent to the situation at hand and individuals involved. At least thats been my observation in real life.

If pulled over by a cop one submits or gets more than just a ticket.

When one is teaching a class, one holds authority over one's students or gets run over.

Etc. etc.

If you top someone in a bdsm capacity it doesnt mean you suddenly stop being any less of a submissive or slave in relationship to those who normally hold dominion over you. (unless of course they are the one your topping, and well then, I would submit that your relationship dynamic isnt really that of a TPE M/s).

As for weather or not "switching" what used to be "earned" titular distinctions from dom to sub or back again with the same or different partners on a casual basis makeing one any better at being a dominant or a submissive as opposed to those who do not "play a role" and live their lives as what comes natural to them within that bdsm context etc...it is simply a spurious coorelation at best in my opinion and experience.

The best rocket scientist is not nessesarally an astronaut. The best horse breeder is not nessesarally a jockey. The best dentist did not nessesarally have braces as a child. The best oncologist doesnt have cancer. The best master was not also a slave or vice versa. The list goes on and on.