Several summers ago after a hike in the woods, I discovered a nasty tick bite in my scrotum with swelling in the cord which necessitated a trip to the doctor's office for antibiotics. When the nurse asked me to show her the problem, I chickened out. (If she had insisted, I would have done it. I guess I am a repressed submissive....)
Since I had a number of other similarly inflamed bites on my legs and stomach, I did undress totally for my male doctor. To my surprise while laying on my back on the exam table, he gave my privates a real thorough examination, way beyond what I expected. (This was the first time in almost a decade that I had been totally naked during an exam.) I kept hoping the nurse would pop into the room for some reason, but she never did. :-\