I grew up in a very small rural town with only three male family doctors (no pediatric specialists), and they were partners, in practice together. Some families preferred to request a specific doctor, but my parents didn't have a preference, so they just let the office manager decide with which doctor to schedule our appointments.
Out of a desire to be logistically efficient, my parents would almost always schedule a single appointment for their annual physical examinations. Of course, I'm sure they were each billed for separate individual appointments. But, logistically it was one appointment, and both of my parents were in the examination room together for the duration of each other's examinations. They felt that attending each other's doctors' visits was also a beneficial way to stay well-informed regarding each other's health.
They also made single appointments for me and my sisters. Of course, as we grew older, we made our own separate appointments, and we showed up separately. But, my sisters (one older and one younger) and I saw these three male doctors from infancy through our early 20's.
The last time all three of us went together was when my older sister was 16.y.o. (she had recently received her driver's license) and our mother asked her to bring me and our younger sister to our appointment, because my mother had some other event to attend at the same time. The receptionist knew our family well and knew that we did our appointments together. So, when an examination room was available, she called to my older sister, “Okay Susan, you can bring your brother and sister to exam room #3.” We went back and the nurse came into the room. She also knew our family well and said, “Okay Kiddos, time to strip down for your exams.” My sisters stripped to their bras and panties and I stripped to my boxers. This was not embarrassing for us because this is exactly how we had experienced all of our prior physical exams, from infancy. What happened next was a little bit awkward, however.
The nurse did her normal nurse stuff (vitals, height/weight, general health-related questions, etc). Then, we had to wait for about 10 minutes for the doctor. When the doctor showed up, he brought another female MD with him. Because we lived in the rural southwestern Chihuahua High Desert (at approximately 5000 feet of elevation), and we spent a lot of time out in the sun (often over 100°F for days/weeks during the summer months), our mother had made arrangements for us to have our physical exams while our family doctors' practice was hosting a visiting dermatologist who was doing exams for an additional fee. Our mother had not told us that this was happening, and we didn't know what to expect.
Usually, the family practice doctors did not require us to remove our underwear in order to conduct quick cursory exams of our “private parts”, but today was different. My older sister was first to be examined by the doctors, and the nurse said, “Susan, in addition to your normal physical exam, today Dr. Espina is going to do a thorough examination of your entire body for any skin diseases, so please remove your bra and panties before climbing up onto the table.” Of course, the same was eventually required of my younger sister (11.y.o.) and me (13.y.o.).
As I mentioned above, and in other posts, we grew up in a conservative rural southwestern ranching community, but people were not prudish regarding nudity that was not considered sexual. My sisters and I were not usually embarrassed to see each other naked. Even our parents did not go to great lengths to avoid having their children see them naked (or vice versa). We certainly did not live a nudist lifestyle, but we lived in a relatively small house, with one bathroom, so it was almost impossible to avoid some family nudity, and it would have seemed silly to go to great lengths to avoid it amongst family members, or to be embarrassed when it did happen.
Somehow, however, this was different. It was undeniably awkward, but also fascinating/exciting, to watch my sisters remove their bras and panties in front of a male doctor, a female doctor, a nurse, and me… to be examined first by the male doctor (the normal part of the exam) and then very meticulously by the female doctor (the dermatologist), under a very bright light that she had brought with her. When the dermatologist examined my older sister, she looked very closely at a spot on her left breast, near her nipple (right at the perimeter of her areola) . She measured the size of the spot and had the nurse take notes regarding the size, shape, and color of the spot. I noticed that my sister's nipples became very erect. Similarly, the dermatologist closely examined a spot on my younger sister's inner thigh, only a few inches down from her vagina. Although I did not fully understand what was happening, I noticed several indications that my younger sister's body was sexually aroused.
I had never previously, and have never subsequently, found myself feeling any sexual arousal in any way related to my sisters, but on this occasion it happened. The combination of seeing both of my sisters stripped completely naked in a doctor's office (and having their breasts and vaginas closely inspected), AND knowing that I was going to be next to be naked on the table, was too much! One minute, my younger sister was on the table, with her legs spread wide. The next minute, I was told to remove my boxers and climb up onto the table. So, there I was, in front of our family doctor, his nurse, the female dermatologist, and my two sisters, with a very hard and throbbing erection.
The dermatologist was very kind. She said, “Don't worry. You're a teenage boy. If you did NOT have an erection under these circumstances, I would probably refer you to a urologist. And, it is actually very helpful, because it is much easier for me to examine an erect penis.” When it was time for me to spread my legs, for my penis and scrotum to be be examined, I had an explosive orgasm when the doctor tugged very gently on my frenulum. In spite of the doctors' attempts to comfort me, I was horrified, while my sisters enjoyed every minute of me suffering the embarrassment of my failed attempt to have self-discipline/self-control over my penis!