http://theporndude.com/ is more of a collection of lists of sites for various things, but it's a decent starting point to find new streaming sites etc
Ad Blocker strongly advised
I used to use certain NSFW video/GIF sharing forums, finding or making a thread dedicated to the kink and starting with examples. It's also possible to cast a wider net (e.g. 'leggings thread') and then request more of a certain kink ('animal-print leggings').
I can't give examples, I'm just not in the scene and the sites I know died long ago, and surely there are some around. I'm tempted to even do an analogue here, making a Lemmy community instead of a thread. I just don't have the time or interest to moderate another site (I already manage too many)