I stumbled into medical fetish by way of researching online to educate myself because I was afraid. When I was maybe 20 or 21, I wanted to go into birth control but had never had a gynecological exam… and I was so scared of the prospect.
So I went online to read more about what to expect - how the exam would go, how long it would take, what it would feel like, etc. In this search, the most helpful answers were the ones that were presented in an exam walkthrough format.
At first, the walkthroughs were more informational, not erotic at all. They were helpful. And I made it through my first real-life gyn exam and it was not all the Scary Experience that had been built up in my head. But it also grew into more than facing fears when I (accidentally?) discovered a walkthrough on a website (I think it was Doublemoon Paradise, but that may not be what it was called). It was not erotic in nature, but a lot of other stuff on the site was, and I was curious…
It was a gateway, and from there I found Speculum pages, an online forum (on AOL, maybe), then later learned/heard about/read Playdoc and Xamminer… and realized that not only was I no longer afraid, but I was also turned on - only when on the net.
That was years ago, of course. I even had joined this site (same name) before (having deleted when fam & I moved to Florida… not sure why, maybe closing a chapter? When we relocated back to NE, I regretted having deleted and recreated… but that’s another story).
Anyway, my kink bled into a real-life exam about three years ago. Anticipating it vs. the scenarios in my head vs. reality met up during my last well-woman exam, and the exam itself was a huge turn-on. I only hope it wasn’t evident to the person conducting my exam.
So that was the evolution for me. Fear led to fear-facing in perhaps what - to someone who does not have a med fetish - may seem an unconventional way, and conquering that fear gave way to arousal.