First I’m struggling to find any decent subreddits to chat on for this topic, all of them are just for posting pictures, if you have any suggestions please let me know.
Second, if you are looking to dive into these topics feel free to DM me. I have a thing for a lot of scenes on this topic but I want to hear if you like something I never heard of or discuss something we share an interest for.
Source: reddit.com/r/Erotica/comments/zu5q8b/for_those_into_nonfiction_nsfw_aliens_monsters
While I’m not aware of any discussion based subreddits, I am part of an erotica writer’s discord server that does a lot of speculative fiction.