I share the same opinion as my bed and room. I don't care, piss wherever. One may complain about smell, but I love the smell of piss. I love watching people pee in their cars and if I had one I would want someone to soak the car. I'd probably purposely plan to make major modifications to waterproof the car only so that if I ever have to drive other people I can get the smell out. However in this reality if I had two cars, one for regular use and the other for special uses I wouldn't even care. I also love hearing piss hit the floor and what not.