Some years ago I did have a play examination by a male doctor. It was all organised for the enjoyment of my then wife, who had just really got into watching me being examined and humiliated.
Like most straight men, I'd always felt uncomfortable about being examined by another male - even more so for a play exam where there is a choice.
Knowing this, my wife had organised a visit to the "doctor" on the pretext that I was having difficulty getting an erection and also suffering from premature ejaculation, which was affecting our sex lives.
After arriving and waiting to be called into the exam room, we were led through to a female nurse. All seemed totally normal at this point and, I undressed down to my underwear as requested. The nurse started taking my weight, blood pressure etc. when the door openned and in walked the male doctor! I didn't know we were seeing a male doctor until now.
The doctor then carried out the full examination with the nurse assisting as necessary and, my wife watching and enjoying every minute.
Needless to say, with the reports of my problems it was a very intimate exam, making it exceptionally embarassing for me and something that's never been repeated. After this, things moved on to me being examined in front of more and more people to add to my humiliation, but I still think this was far worse.