I never knew this until I was much older, but I apparently had an older half-brother who died of a childhood disease during the war years, and subsequently when I came around, my mother especially must have decided to err on the side of caution whenever anything medical was concerned. Hence I was often taken to the doctor for check-ups and at the slightest sign of an illness it was off to the doctor´s office. I also got all and every kind of inoculations and since we often traveled between the US and Europe, I had 3 sets of smallpox vaccinations as well as a child. And when in Europe, my aunt often took on part of the medical burden as well, with my somewhat younger cousin and myself being the recipients of medical preventive care.
Which means I saw a lot doctors when still young.
I also found a medical book in my Belgian grandfathers library, one with illustrations. This I took with me and pored over the contents very frequently, becoming aroused and excited at all the odd types of penetrations done by medical instruments into the human body.
And once during a lunchbreak at an American middle school, I joined a group of students who were being regaled by the tale of a very detailed medical examination, which included a genital and rectal exam and of course full nudity. This fascinated, scared and aroused me to no end.
I´m quite certain that all these occurrences taken together are in some way responsible for my medical fetish. How and why just exactly I could not really say, since i am certain many other people have had similar experiences without becoming fascinated with medfet stuff. But I do think it was all instrumental in some manner or another.
I´ve also read that a medical fetish can come about as a manner of sublimating or coming to terms with fears of having to undergo medical procedures. This could very well have an element of truth since I vividly remember being extremely agitated, if not to say frightened of undergoing medical exams when young, especially school medical examinations.
Now, why I should have been afraid or frightened I have no idea either, since I can never recall being treated untoward or in even a mildly unfriendly or painful manner at all. I never cried or was afraid of injections, didn´t feel them at all in fact. And all doctors that I can recall were friendly and apparently competent, treating me as should be done. Yet even so, whenever a doctors visit or school med exam was announced, I would be jittery and frightened internally, in my mind. Though for what specific reason I have no idea. Maybe I have forgotten something when very young, maybe not.
When I was 31 I underwent a very serious operation. All went well after a long hospital stay and I think that I came to realize that doctors and nurses were not to be feared, but rather trusted and did indeed do their best for patients. Afterward I began to consciously enjoy aspects of medical fetish play. I had been doing the same for a time before this as well, but not in a conscious manner. Now it was a choice on my part ... and has been since.