woke up late for work, drank like four cups of coffee to wake up, and is now stuck in traffic. absolutely bursting to piss, but what are they going to do? maybe there's a cup or bottle, but no way that'll fit everything. they could get out and pee on the side of the road, but what if traffic starts moving again? no, no, they'll just have to hold it. bonus points if someone else is in the car to witness all of it
inhuman character in a human(oid?) body for the first time, has to learn about bodily functions. most of them are easy enough, but they take a while to figure out when they need to pee. a few accidents happen before they get the hang of it. maybe they even decide they like the feeling of it, and have to be told very explicitly (some punishment/negative reinforcement even) that they're not allowed to do that anymore
person who loses literally all bladder control/capacity when drunk either forgets their tolerance or is peer pressured to drink more than usual and has to deal with the consequences
fear wetting!! typically tough person gets in a situation a couple degrees scarier than what they usually deal with, and out it all comes. great especially if someone has to help them deal with the aftermath, comforting them and telling them it's okay, it's just your body, there's nothing wrong with you. maybe the comforter is a bit into it as well, and they fuck about it later :)
someone gets cursed to not physically be able to release their bladder unless under certain conditions, but when those conditions are met? immediate release, no matter when or where they are. could be something like not being able to piss unless at 100% capacity, or only being able to piss at a certain time of day, or even only while doing a specific other task or activity like sleeping
elevator omo... maybe the lift breaks down, maybe they're already desperate but the bathroom is on another floor, either way they wet themselves in front of whoever else is in the lift (be that one person or multiple)
hmm may make another post like this later... i have to start writing things down when i think of them instead of trying to remember them for later lol