Well seeing that you include shorts of nude men and women interacting and do sex especially with the neat design, like this screenshot here
I still think maybe you can do a nudist spinoff of the Paradise Lust series taking place in the nudist resort on an island or forest, so you can play either a male or female to interact with the naked women in the nudist resort and have sex with them, just give it a try.
Perhaps you can start off with a small demo showing what the paradise lust spinoff would look like and see if people will like it , just give it a shot