Embarrassing Physical Exam

The summer before eighth grade, I had to have a physical exam from a doctor to participate in fall sports in the coming year. I had been masturbating for well over a year and was jerking off 1-2 times a day. Back then, masturbation was never talked about, and my parents never talked about sex, and being seen naked in the house was something that never happened. Unfortunately, I was a very horny teenager, and I didn't know much about my new habit. Knowing my exam was coming up was stressful because I felt like my masturbation was somehow wrong and that I needed to stop; otherwise, the doctor would know what I had been doing. Well, trying to stop didn't work. I had boners all the time back then and couldn't control them. The day of the exam, I was very nervous, thinking I would have a boner in the doctor's office. When I got to the office (I rode my bike to the appointment), I tried very hard not to think about getting a boner. Well, this had the opposite effect, and I had a raging boner in my pants. It probably wasn't noticeable under my jeans. Back then, I was about 5'8" and 115 pounds soaking wet, and my cut penis was average size. 

When I was called back by the nurse, she did all the usual vital signs and temperature and had me remove my shirt for the doctor. While I was waiting, I tried everything in my power to get my erection to go down, but nothing worked. When the doctor came in, he asked me the usual questions and started the exam. He started with ears, nose, and throat, then had me lie on the table. He then listened to my heart and lungs, and then he moved to my abdomen. He did all the usual palpating, which didn't help matters any, and then he moved to do the genital exam. I was mortified at this point. What would he say? Would he be mad? I had no idea, and I'm sure that my heart was racing. As I was lying there, he undid my belt buckle and then unzipped my jeans. Well, this was it; he was going to see my boner! He then asked me to raise my hips, and he pulled my pants and underwear down so that everything was exposed. There I was, a half-naked 13-year-old boy lying on a table with a massive boner standing at attention. I was so embarrassed! He checked the pulses in my legs and then felt each testicle for any lumps or bumps. He never said a word the entire time. Looking back at it, he could have at least mentioned the boner, reassured me that it was normal, and talked to me about puberty, sex, and masturbation. I don't know why he didn't. After that, he said I could get dressed, and that was it. I am sure that when I got home, I probably went straight to my room and jerked off furiously.