Pretty much the same way I started exploring my sexuality. I've pretty much always veen into kinky things before I even knew what kinky things were. I remember role-playing something where my character was being ordered around, beaten up, and eventually brutalized by another one, and it really... really excited me. I did not know why at the time but in hindsight it is very obvious lol. I also used to write very violent, gory things with power imbalances that was, again in hindsight, very sexually driven even though I didn't know it at the time.

I also have a specific memory as a little kid of Shaggy drinking a potion that have him the body of a hot chick in one of the live action Scooby-Doo movies. I never saw the movie, I just saw the scene on YouTube. I thought it was 'really funny.' Yeah... funny. So, that's probably the origin of my guy with boobs fetish

When I found out about actual kinks and BDSM, I was immediately interested and intrigued. I tried to learn a lot about irl BDSM and how it works, safety, dynamics, etc, and I wrote and read lots of erotic fanfic involving my kinks. It took me a long time to actually try anything out in person. I bought myself some toys and stuff when I turned 18 and explored a little that way, but I didn't have sex until 21 so I didn't get to really try much until then.

I dunno really, this is harder to answer than I thought itd be. I've just always been like this 🤷‍♀️