I know of course yaoi is going to be common with prostate related content but its insane how almost all content relating to that fetish involves shota and the few that don't are extreme femdom/sissy stuff. It's just so difficult trying to find straight prostate content where its a dude and a woman who are both adults where they are having fun and not degrading one another.
If you have any recommendations I'm all ears. Also I'll post a follow up comment with some good ones I've found in the past.