I think pop culture probably did amplify things a little, but most of it was there. Man, I loved the movie "Bound." Seriously, it's a popular Hollywood movie that's fundamentally a lesbian bondage flick. I saw Gina Gershon in "Cabaret" on B'way after that, and while she is not a great singer, she was super hot. And while it leaves a lot unsaid, Cabaret is probably the kinkiest B'way hit ever. And after "Bound" not shockingly both Wachowskis turned out to be trans and at least one a serious sub. And then the internet, starting with Usenet, which is surely before your time. Before it got killed by spam, I remember looking at alt.sex.bondage on Usenet thinking, oh just gonna be a bunch of nerds, should be funny and boy was I wrong.
I was always too shy to try to ask for the things I was curious about. My very first experience was at the Fortress. Well, I dropped by one of the fetish clubs once, when they still existed, but I went way too early in the night and it was, uggh. The Fortress seemed like a safe space to explore things I was curious about. And it has been