Two years ago, I tried generative AI for my smut literature needs. I found Smitten, a NSFW erotic story LLM based on Mistral if I'm correct. It creates up to 2,500-word stories about what you want and is legal, be it zombies, toe socks or sexy steampunk clockmakers!
Quality depends on your input and sometimes weird (but funny) stuff plops out.
https://www.smittenstories.com/
