When I was 16 i had a physical exam with a endocrinologist, and my parents were present in the room. I'm handicaped, with a kind of congenit condition known as OI, that involves a delay development, and for that reason I reached puberty when I was 16. In that medical apointment, i was totally dressed, and lying back. The doctor, a atractive 40 years old man, begin to examine me, heart, lungs, ears, etc, then he examined my abdomen and when he was near my waist he said "I will look down there. Is there any hair yet??", i was embarrased because my dad was very close, but when i saw that he went a little far in the room i answered to the doctor, full of proud "YES", the pubic hair was very recent and i was happy for it. The doctor unzipped my pants, and lift the elastic of my boxers, he softly touched my balls with one finger and said "Good, there has been some testicular grown", I began to have an erection, but he quickly zipped my pants.
I was so excited, that when i came to home, i began to touch myself and that was my first masturbation wit cum. Thats the beggining of my unexplored med ted.