I gave an exam like that a couple times – I had been talking to a guy online for a long time who was mostly into the idea of a long extended session having his heart auscultated. We discussed various versions of the scene below for a while, and when I was planning to pass through his area, we made a plan to meet in a hotel room for an exam.
The exam started with him standing shirtless in gym shorts. I auscultated his heart at “resting”, although he was clearly a bit nervous and I took this as a sign to take it slow with him. I listened to each of his valves (APTM), and discussed how much and how he worked out. Then I started feeling all his pulse points - temporal, carotid, axillary, brachial, radial, abdominal, popliteal, dorsal pedal. Then I told him that to feel his femoral pulses, I would need to slip my fingers inside his shorts and underwear. He nodded and said that was ok. I slid my fingers down and found both pulses easily - that were very strong just like his others.
Next I asked if he could get his heart rate going faster with some exercise. I suggested squats or push-ups, and he did a set of each with very good form while I watched. Then I told him to lay on the bed, and I repeated the auscultation and pulse point exam with him supine. In this position, I noticed that especially when I was listening to his heart, there seemed to be some movement inside his shorts. This time, when I slid my fingers inside his underwear, he asked if there is also a pulse in the penis. I told him yes, it can usually be felt more strongly at the base. He asked if I want to feel it, so I did.
I could feel that he was rapidly getting harder, and so said that if he was ready for me to examine his penis more thoroughly, he should take off his underwear. He did, and I could see him pulsating to a full erection. I still had one hand holding the stethoscope over his apex, while I felt his entire penis pulsing in my other hand. I began to slowly stroke it at his heart rate, which had mostly recovered by now after the exercise, started to increase again.
I stroked him a bit and we both listened to his heart while I did (he had brought his own stethoscope). I asked him to hold my steth against his chest while I continued the exam of his penis and testicles using both hands while keeping the stethoscope in my ears. I asked if he wanted to keep stroking him and he said yes, it feels good. His heart was definitely going faster at this point. I wanted to hear what his heart did when he climaxed but he seemed shy about going that far, though we both had a very good time.
We were able to meet up again, and did through largely the same exam again, but more slowly and with a bit less nervousness on both of our parts. These sessions are among my favorite memories of giving an exam!