Perhaps some of the only porn someone can consume ethically. I guess there’s an argument to be made about poorly paid animators drawing smut in animation workhouses, but it feels like most of the western world, when it comes to hentai, consumes rule 34 of franchise characters from media. Beat my brain up as I may, I can’t see anything wrong in that and would much rather a fictional character be debased than an actual human for money.
Some of those renpy adult visual novels can be included here as well. A lot are projects by individuals or cooperative small teams using open-source software, some have voice acting, but they can all be released completely anonymously so there’s not even reputational damage of the type typically found in puritanical societies. While they’re susceptible to the same kind of :libertarian-approaching: grossness as hentai, most aren’t and even tend to appeal to a larger array of audiences.