My brothers and I had physicals together a lot but any time my sister was in the room, the most she ever saw was us with our shirts off or maybe sometimes in underpants or a gown. She was always out of the room when any serious exposure happened.
BUT, this thread reminds me of a brief exchange I remember that I still think is cool. My main exam experience - the one that fuels my fetish to this day - was being part of a program as a kid/teenager that included many examinations over several years. I've spoken to a handful of people on here about it. One time, I was sitting with my parents in the waiting room that was dedicated to this particular program on certain days (at a large teaching hospital) and there was another guy sitting across from me, maybe about 15 years old, waiting his own turn for the same thing as me, with his mom and dad and much younger sister, who was maybe 7 or 8, possibly a little younger.
The sister was very clingy with her brother and they clearly loved each other. She sat next to him with her coloring book asking his opinion on what she was coloring and getting him to color with her.
Eventually, one of the med students who helped with this program came out to get the big brother. He kind of stood up with a sigh, and put his denim jacket on the chair, and was ready to go back with the med student when the little sister grabbed on to him and whined that she didn't want him to go. The parents and med student thought it was cute and told her it would be ok. And then she started to wine "Can I go with him? I want to go with him!"
That went on for a short bit and the med student, very matter-of-factly said, "well, when I take your brother back for the doctors, he has to take all his clothes off for us. So, let's let him have some privacy for that and, when he's all done and all dressed again, he will come right back out to you, ok?"
For some reason, I have always thought that was cool.