Here are a few AI image generators that have been associated with NSFW (Not Safe For Work) content, though keep in mind that the availability and policies of these tools might change over time:
1. **Stable Diffusion** - An open-source model that can generate images based on textual descriptions. Users sometimes create NSFW content using custom models and prompts.
2. **DALL-E** - Developed by OpenAI, it can generate images based on text prompts.