So far, I'm mostly using Pornworks. It can be frustratingly slow, like put in your prompts and go do other things, because it could take five or even twenty minutes. And 90% of what I get is either too ordinary or there are fatal flaws, like an extra arm or goofy teeth or whatever. Some of the better ones are fine as they are, while others I morph/edit in some way in Photoshop.
The very best AI stuff I've gotten is from Midjourney, but none of that is even remotely erotic. There, if you even put in a prompt like "big chest", you get a warning about being banned. A shame, because some of what it creates is amazingly real-looking.
I'd love to hear what other options there are.