The hilarious thing is the mainstream is so much more explicit and sexualized nowadays, check out this music video animation on youtube
https://youtube.com/watch?v=6QFwo...layer_embedded
Try putting that on a paysite and you'd get canned faster than you can say tentacle monster.
The way to go seems to be go mainstream, and put all the sex and perversion you like as long as you stay an inch away from being actual porn you'll be golden
take Queen's blade for example: Not porn. Just very, very, very close.
https://youtube.com/watch?v=6QFwo...layer_embedded
edit: fucking embed tags haven't used them in years