Watched my wife masturbate with a vibrator a couple nights ago while I was locked in a chastity cage for locktober and only allowed to watch. It was very hot.

Liftoff works great for it.

You might find a few things that interest you at !sensualbdsm, though that’s going to be photography rather than art.

I’ve always loved being scratched (and bitten, slapped, whipped, etc - I just love pain). My wife scratching her nails up and down my arms can send me to another world.

Personally, I love the more niche fetishes, but I do agree with the other posters here that we probably need more vanilla and conversation-driven coms first to drive engagement.

As I think on it, a place for amateurs to post a la gonewild and its variants would probably be a draw.