I think or more so wish there were some more kinky twists in your little adventure. But non the less I also have a pretty simple dare for you:
You will go to a public toilet with at least 3 stalls. You can always choose the location and the time you will do the dare. But once you enter the toilet you can’t back out (Meaning you can’t scout outside to make sure there is no one inside but also if there wasn’t anyone during the time you waited it will be more like that someone will come in once inside so it’s completely up to you). When you enter the toilet you will go straight to the farthest stall and strip completely naked. OH AND DID I MENTION you need to have been holding your pee for at least 30 minutes since you started feeling like you really need to pee to make sure you are really full and desperate. After you are naked you will leave your stall with the the door open and move to the first one where you can relieve yourself and only after that you can return to the original stall and get dressed again.
Love it. Will add it to my list