The doctor and both nurses who did my colonoscopy were all females. They did ask if I wished to have a male staff member present as a witness. I declined. I figured three people staring at my ass and nearby regions were sufficient. I couldn't see much advantage in a fourth.
My PCP for quite some time was also female, and she never asked if I wanted a male staff member present during any kind of exam. But then again, I don't think that office had any male staff members. I would have declined anyway. I think it's pretty ridiculous, to tell you the truth.
Rich