There have got to be community fine-tuned models for this floating about.<p>I mostly work with image gen so I can't give you recommendations, but there are plenty of people fine tuning their own models to make smut. Discord servers and patreon accounts.<p>You would probably have to get into the community to find the best fine-tunes for adult chat but they're certainly out there.<p>HN is a bit too high brow for this request, you'll probably have better luck on Reddit.
When you say “all popular models” do you mean the commercial models or open source as well? My assumption is that you’d need to run an oss model at the minimum and maybe apply some jailbreaking on top of that.