Even though I doubt it'll make anyone think differently, I'm going to add my $0.02. I go to a school that's very good at making sure everyone feels okay about the physical exam being performed on them (making sure girls can work with other girls and boys with boys if that makes them comfortable) - I never really thought about it until we got to the heart part of the exam.
I was already partnered with a male, and I am a female who is very well endowed in the chest area. I had never felt uncomfortable with physicians listening to my heart or anything, but having a classmate do it, while I was sitting in a bra was extremely uncomfortable, especially when we got to the part of feeling for the PMI. Its obviously difficult to feel on me and I had to ask him to stop because I was getting more and more uncomfortable. He had no problem with that, and he found someone else to find it on so he had the experience and we moved on. It wasn't a big deal in the end, but it does make me aware of what others go through.
I don't need a fellow student performing an exam on me to know what it feels like - I've known what a physical exam is since I was a child. We've all been to doctors, so we've all been through a physical exam as a patient. I know there are things that we do in school that may have never been done (like the PMI), but I still don't believe it has to be done on me by a colleague just so I know "what it feels like." We all have imaginations, so we can all figure it out for ourselves. I feel very lucky that I had a very respectful partner - and I was respectful of him when it came to things like feeling for the femoral artery. I already knew him from our semester of interviewing (we stayed in the same groups), but if I had been in a new group I probably would have just asked to be with another female.
If a male (or a female with smaller breasts) ever wants to try to tell me that I shouldn't feel uncomfortable, and it's a "good experience for me to go through," my response is going to be: "You've never been in my shoes and you never will, therefore who the f are you to tell me how I feel?"
Again, just my experience and my $0.02 so take it with a grain of salt.