At age 16, I had to go into hospital to have my tonsils removed due to a septic polyp.
I had a Pre-med from a young Polish Doctor which was quite thorough.
He said that it was important to check me from head to Toe and EVERYTHING would be looked at so I had to be a brave boy.
As He progressed he ultimately lowered my pj's and gave me a complete genital check which was very embarrassing.
During this he said that I had a very strong pulse in my groin and that he needed to examine me further and he spent the next few minutes placing a stethoscope all over my Penis, Testicles and Groin.
I had my testicles tapped and manipulated as he listened very carefully.
he then used another type of stethoscope with a different end on it and I could hear the "Swishing" sound like when they use ultrasound on a pregnant woman.
Nothing like this happened again until I was Circumcised due to Diabetic complications a few years back.
During the examination, the Urologist commented that I had a very strong pulse in my groin which he could feel.
Apart from a good feel , no stethoscope down there then or since.