As a rule I don't remove clothing during session. It is a personal choice because I have never considered being naked or exposed just because a sub wants that, to be a dominant act. However . . .

I do gs sessions and I have:
Pulled panties aside and aimed
Pulled down pants, shorts, etc and sat on a toilet seat made for gs

I don't want to get My undies wet with urine! I do remember deciding to do an impromptu golden and realized the outfit was not something that accommodated it so I went through My fishnets. It made a bit of a mess and is not something I would likely repeat.

That being said, I do think some subs request gs just to get a peak, which is why I require consumption as a payment for looking ;-)