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.
Even then, not to nitpick but then you have exploited animators who are under a lot of crunch time, but that’s definitely much different than someone just wanting to learn how to draw the human body.
Check out c/hentai to learn more!