So my idea is to start with a story where you the reader are visited in a dream to be told you are going to wake up in an alternate reality, where the rules around peeing would be shocking to us (maybe you'd be expected to wet yourself, or maybe you'd be expected to only pee at the base of a plant or whatever, be s wild as you like). Then you wake up in said reality and have to slowly adjust to the unorthodox peeing. What do y'all think? I already have a draft, but I feel unsure about publishing.
Personally, I don't find that appealing but if you think that it is an erotic kink which could be enjoyed by some readers, there seems to be no reason not to publish it.
I wouldn't worry about whether it'll fit someone's kink - if you like it someone else will too. I'd worry about writing it as best you can, then go for it.