NovelAI's models are finetuned on a wide corpus of content including sexually explicit content, and iirc one of their image models was trained on a website oriented for sexual content. They also support custom finetuning modules that can be trained on just about anything. The NAI models are also available in API form at goose.ai.

Previously/currently their models are all based on open-sourced models and are really showing their obsolescence compared to GPT3.5/4, but they just announced they've acquired some of Nvidia's fancy new AI hardware and are training their own models, about on par with GPT3.5.

Sudowrite is not a chat bot, but it does have a very flexible content policy.