There is a story writen many moons ago about a Lesbian couple were the bottom slowly over time gives more and more of her self to her top until eventualy she ends up leg and armless. Then they even take it further until they end up eating her.

I believe the story had her suspended with champain bottles wedged up her pussy and anus wide end first. I believe that she felt her legs where in the way so she ask that they be amputated.

They ate those also. I think I still have the story in my archive some place it would take a bit to find it.

Point is when it comes to "pain slut ology' There isnt much that has not been done by others. Sorry to say there does not seam to much that hasnt been explored.