CW Violence against women:
Here's a weird one from me. It's called "Ryona" and it's a type of hentai wherein it's about women being bullied. I've seen it in video game form on youtube and nico video. Usually it's fighting games, and the video is about the female fighter getting pummeled. Weird as shit and I've know about ryona since early 2006 youtube where I originally found it.
A more benign fetish I saw years ago on youtube was video of women getting their cars stuck in the mud. The video would have close up shot of their naked feet on the gas peddle trying in vain to get the car unstuck. This fetish was pretty comical looking back on it.
Primal is just BDSM for the MMA generation. It would fit in to Felix's documentary. I did suprisingly well in my local scene just doing extra bjj drilling back when I was active.