I've been examined in a gyno chair many times, I think it's what got me into this whole Med Fet thing in the first place.
The first time was really really embarassing. I thought I'd already suffered every possible humiliation, having had regular exams for a tight foreskin - which finally ended in a second circumcision.
The first time in the chair was when I was suffering with soreness around the circumcision scars; I'd been to my (female) doctor a couple of times already, but she was unable to find the cause.
This particulat day I had one of the last appointments in the evening. I went in and explained the problem was still there and she said they'd need to take some samples to send to the lab. The doctor went out to speak to the nurse, then came back and asked me to go into a neighbouring room with the nurse while she saw her last patient.
In the room with the nurse, she explained that the doctor wanted to take some samples from my stitch marks, where she though the infection was. Then she added that the doctor had asked her to prepare me and that they needed everything else to be totally sterile. So, off with the clothes - nothing unexpected there - then she asked me to get up onto the table. As I'm sure all of the females are familiar with, I was then shuffled to the end, my knees raised and put into the rests, then spread as wide as possible. I felt totally exposed and very vulnerable. As if that wasn't enough, the nurse totally shaved me and cleansed everywhere with some fluids.
I was left like that for 15 to 20 minutes before the doctor came in and used a large needle to extract samples from inside the small folds of scar tissue.
That was my experience and, at the time, it was the most humiliating experience of my life. I then had to go home and explain it all to my then wife, who was astounded at what I'd been through. I later found out it also really excited her, which is why she managed to watch a later examination (a story I've already posted).