Yessss! I got to be present at one while my wife was pregnant. I stood by her head and the doc (female) had draped her lower half. I was just happy to be there.
Doc was doing the checks and they chatted with each other. I couldn't see anything.
The doc looked to the side as she did the exam. Seemed like she looked away to focus on what she was feeling with her fingers.
Suddenly, she snapped her head up and looked right into my wife's eyes.
"Relax your bottom," she said sternly.
My wife sighed and raised her eyes to the ceiling.
I damn near came right there and then. I couldn't see what was happening, but knowing was enough.
(The doc was obviously doing a rectal exam and my wife had clenched as the doc's finger pushed against her anus)
Up until that point, I had only lightly fingered her outer ring and taken her rectal temperature. That might have been the first time anyone had ever slipped a finger up her rear.
Needless to say, we had great sex later that evening because I was on fire.
This was a decade ago. She regularly takes more than a finger up her bottom these days. I've been to several of her appointments since then, both for support and for my pleasure.