Have recently been enjoying sharing with various Zity correspondents the many things, from my boyhood onwards, that probably contributed to my medical fetish. (I have posted about some of them online here: e.g., about having my tonsils out at age 4.) It has been fascinating to notice overlap with the experiences of others. But today I remembered something that I've not seen anyone refer to - the possible influence of one or other parent. In my case, it was my mother. Again possibly. What I remember is that she was a keen reader and always had a pile of books from the library. Many of them were travel books or biographies. But I also remember that many of them were books with medical content, including some fiction (e.g., the 'Doctor' series by Richard Gordon that became the basis of several popular British comedy films). Further, I think I remember noticing that many of these books contained descriptions of medical operations, and that Mum was a little self-conscious about my spotting this. Nothing was said, but I'm pretty sure I'm right. And just that self-consciousness of Mum's made me feel that the topic had something slightly 'furtive' about it, which I quickly associated with feelings of my own going back, as I say, to when I was a kid.
I read, or skimmed, several of the 'Doctor' books myself, then and a few years later. I've never forgotten the description of the surgeon Sir Lancelot Spratt (played wonderfully by James Robertson Justice in the films), that he routinely got through several kids' tonsillectomies a day, like he was slaughtering pigs! There's comedy for you!