Growing up I didn't know of many fetishes that weren't mainstream and/or joked about by the general public, and honestly didn't know of many in general.
One of these would have been having a foot fetish, which I never really understood during puberty. Of course later on I grew to appreciate it and I'm glad I did through older women like teachers or the school librarian always having footwear that showed off well taken care of feet and imagining myself pleasing them by massaging them even though they're not really considered an erogenous zone. I guess it came more when I realized how enjoyable fantasies of submission are while before I would say I was dominant.
The same could also be said for medical fetish. I never enjoyed having to be touched anywhere by the doctor or get nude. I also never played doctor as a kid so examining others never crossed my mind as something that could be appealing. That all changed when I had my first appointment with a female doctor during puberty and even though I didn't get nude with her then I knew I could enjoy it as a humiliation fetish was also starting to appeal to me by then. I did almost get seen by a staff member at that clinic that day which led me to look for similar stories. I was sick so had all the time in the world to take a deep dive into the fetish.
Anyways do you have similar stories or want to share how you got into fetishes you might have found strange before?