I think you're misusing the search. If I enable nsfw by adding `nsfw:yes`, both 'asian' and 'european' show ONLY porn results both for content and communities. If I omit the `nsfw:yes`, but allow my profile to view nsfw content, both 'european' and 'asian' don't show any porn in the search results.

The search filter is either a binary, or there's just so much porn for everything that it doesn't matter.

There was no "nsfw:yes" in the search box. It was literally just "asian". I am using the search feature on the new reddit design on web: https://www.reddit.com/search/?q=asian&type=sr%2Cuser

Other ethnicities, also show up with some porn results, but not nearly as extreme as for "asian". e.g. for "white" and "black" it was about a third of the top 20.

I have 'Enable to view adult and NSFW (not safe for work) content in your feed and search results' enabled in my user profile, and this is what I'm seeing when I click that link: https://imgur.com/gm9PZqZ

Here's what I see: https://i.imgur.com/VMTdfDk.png

If you just recently enabled the setting in your user profile, probably there is just some caching on reddit's side so it is still serving the old results from before you enabled that.

Won't that bias the search towards showing you NSFW content? Since you specifically made it clear that that's what you are interested in.

Also try that on pornhub.... Half of reddit is a porn.