At my semi annual skin exam last week, all the assistant said to me after she led me into the exam room & asked the reason for my visit was "I'll give you a gown" as she handed me a gown. She said nothing about undressing at all.
Your post reminded me of the dermatologist exam that I had just over a month ago. I also go every 6 months for a skin check (I've got a lot of moles, skin tags and "age spots"). My doctor has switched from a completely nude full body exam every 6 months to doing that only once a year. On the alternating 6 month visit, she checks what she refers to as the "sun exposed areas". The only difference in the two exams is that I leave my underwear on for the "sun exposed" visit while everything comes off (including underwear) on the full body exam visit.
I've been seeing this doctor for a good number of years, and have gotten used to the way she does things. And her nurses are familiar with me. So much so that lately I start to undress as soon as they take me back to the exam room. And that's what I did at this particular visit. The older nurse (I remember she was the same one 6 months ago) took me back and told me I could have a seat in the chair (not on the exam table). She started to review my history and meds, asking if I had any problems to discuss -- all of that. As she started reviewing everything, I immediately began to take my shoes and socks off. That was my signal to her that I already knew the drill and was comfortable starting the undressing process while she was still in the room.
After another minute or so while she was still reviewing my records, I stood up and took off my outer shirt and the T-shirt underneath it. I was now standing in front of her bare-chested and bare-footed but was still wearing my pants. It was just as she was almost done asking questions that I started to undo my belt, signaling to her that I wasn't done undressing in front of her. Then with no hesitation at all, I slipped my pants off, neatly folded them and placed them on the chair where I was briefly sitting before. I was now standing in front of her wearing just my Duke Pro jockstrap with a wide 3" waistband. It didn't seem to bother her one bit and she continued talking without missing a beat.
As she was was getting ready to leave, she asked if I wanted a sheet to cover up. I hesitated for a few seconds thinking about it before asking her if this was the visit where my "strap" needed to come off or if it stayed on. I said that as I tugged on the waistband of my jock a little bit, just so she knew exactly what I was talking about when I used the term "strap". I already knew the answer that it would stay on, but I really enjoyed asking her that question as I stood there facing her in just my "strap". Deep down I knew that asking her that question and tugging on my waistband would force her to look directly at my jock. She couldn't ignore it after I asked that question. She looked down at it and confirmed that it could stay on this time, so I told her that I didn't feel like I needed a sheet.
She left and I waited for the doctor (and her) to return. They did in a few minutes and my exam was conducted like that with me in just my trusty Duke strap with no drape, sheet or gown to cover me.
So the moral of this particular story, is that sometimes you aren't asked to undress at all. If you already know the drill, why wait? Just go for it.