My most stark example of this experience happened when I was a teenager, about 2013 here in the UK.
I'd been having frequent issues with my stomach, and had been taking medication for a short period to help aleviate it. But my GP was concerned and so booked me to see a Consultant at our local hospital.
I expected he'd feel my tummy and that would be that, and more of a conversation than anyhting, but I couldn't have been more wrong. I was still really nervous beforehand though, tied with that bit of excitement I've always had as someone with a med fetish.
Anyway, I got called in with my mum and we sat there for a while as he asked me lots of dietary and general health questions, which perplexed him as I was pretty fit at the time and ate very well.
Eventually he said "I'd like to examine you now, could you pop off your shirt, jeans, shoes and socks for me?" I was stunned. Socks as well!
I had the most thorough exam ever. Heart, lungs, abdomen, some basic musculoskeletal too. He felt my abdomen more extensively than any doctor ever did, all while laying there in my boxers. He pressed really deep with his hands, putting one hand behind my back.
Eventually he had me take my pants off, saying (and I'll never forget) I'd like to have a look at your penis and testicles now, and just make sure everything is as it should be" I was likely shaking at that point, he said "you seem really nervous! just relax and let me know if anything is too uncomfortable". He examined my penis, testicles and had me curl up on my side to examine my rectum.
I couldn't believe it, but I'll certainly never forget it.