I don't give my dermatologist a choice, when she comes in the room, I am nude, sitting on the gown the nurse gave me. As I've had melanoma, I'm not taking any chances.
I did the same thing for a mole mapping procedure with 2 nurses.
Years ago, I had a cardiac catheterization. At the lab, they had me stand up and remove my gown. One nurse did my groin shave just like that.