https://perchance.org/ai-story-generatorSurprised this one isn't making the rounds more. It's a very competent AI writing tool, and it's completely uncensored, so far. You can make it do violent cub yiff or whatever else you can come up with, and it gets things surprisingly inaccurate. Only thing is, it doesn't respond to "prompts" like ChatGPT, but rather you have to write the beginning yourself and it continues. Usually it tends to get stuck and repetitive if you don't insert some sentence of your own to guide the story once in a while, but it really does surprisingly well.
You can also try writing a description of what you want in the upper window, but sometimes it refuses to write anything at all or just ignores it, unless you write the beginning yourself. Anyway, a lot of potential, not just for erotica but other controversial material as well.