Public restrooms for sure.
It makes me incredibly hard to drink as much water as possible, and then go to an empty public restroom and piss all over it, doing all I can to avoid pissing in the toilet.
I don't do it very often as I'm scared to get caught + feel guilty about it sometimes, but the sheer thrill of covering the entire room in piss, spit and cum makes it all worth it. Last time I did it, I came really hard on the floor without even trying to get off, and once again in the car on the way home😉