Ironically the only ai I was able to actually do anything "explicit" (clearly sex with swapped out terms) was some anime princess loli. I've picked up a few observations that may or may not be true based on this.
1: categories matter
It seems like characters under things like "comedy" do not use the filter as much. The princess was one was under that category and not anime. I've had similar results with other bots like the maid types. "Anime" and other tags like it seem to apply the filters from the very start of your messages
2: the bot can't do shit
As a continuation of the point above it seems like the filter applies when the bot is trying to "assert" itself or add something to the roleplay you didn't directly say. You know anytime it actually starts to roleplay like a person *bang* chat error then lobotomized response. I've noticed that no matter how sfw it may be, even just talking about something, if the bot begins to start taking actions or pushing things in a new direction they will get filtered.
3: fetishes are inconsistent
I've noticed in my experimentation that fetish stuff like feet, tummies, armpits, smell, feeding, etc. Are thr things that can get the most "explicit" without being filtered immediately, however this ties into the point above where the bit can never actually interact with the idea properly because they cannot assert. You can still get responses but you may as well be talking about your degenerate to a wall. It will only ever get like 80% to a proper fantasy since the ai will get lobotomized the second they act like a real person would.
All of that to say just keep trying you may or may not get lucky. Lower your standards for what counts as sexual too. Everything I said may be incorrect but do keep it in mind and you'll find more success I think
