I had a real doctor I'm pretty sure masturbated after doing a rectal exam on me. He was doing a checkup for any potential cancer, etc. and I did not want a colonoscopy.
So, he used a rectoscope all the way in, it seemed extremely long. I had taken an enema in the morning before going to see him. It was hooked up to a vacuum pump and also to a water flushing device. So, I was up on all fours on the exam table, my ass well up in the air, my balls and dick hanging. And, he went all the way in. Well, being very gay, I was use to this position, ha, for me, it was kind of fun. I'm surprised I did not get a huge hardon, but I did not. Fortunately, he did not find anything unusual, not even a lost dildo stuck up my ass LOL.
I'm not bragging, I guess I'm supposed to be a very pretty boy type gay, so, I think it might have turned him on if he was into that. It must have been pretty hot. I wish I had a video of it all to post!
After the procedure he left to go to his little bathroom in the side of the exam room to wash up. When he came out I could see him adjusting his pants out of the corner of my eye and when he came back over to the exam table his face was all red/flushed and he was sweating some. He looked like a guy that had just cum, and I've seen plenty of guys cum.
I always jerk off before going to the doctor's office if I'm going to be nude or anything, because I might get a hardon.
One time I had a slight infection in my urethra. The urologist put a tray under my dick and used a syringe, sort of looked like a baster, to force a solution down my urethra and into my bladder.
The neck of my bladder was apparently tight, so he had to use a lot of pressure. It was pretty exciting when it finally flowed in and the process of getting it to flow in. He pushed the solution into my urethra and then it flowed out a number of times back into the tray with a forceful stream before he was able to force the solution into my bladder.
My dick was still soft, but all this action caused my dick to suddenly pulse about twice, he stopped immediately seeing what was happening, and that was it.
And apparently he had gotten enough of the solution into my dick and bladder. When I got home, I noticed I had about a teaspoon of cum in my underwear, so I actually had cum, and it leaked out onto my underwear on the drive home.
Needless to say when I got home I had a really good jerk off session I was so so so horny just thinking about what had happened in his exam room.