Hi guys!
Well, the idea is that there are a lot of regular porn videos that are focused on sex but somehow contain peeing scene or scenes as well. These can be part of the regular porn plot or sometimes you can think of them as of an accidental addition (e.g. an actress needed to go and it became part of the scene). And I don't mean series like Pissing in Action or so which, by definition, are porn movies that contain peeing scenes and that's the exact idea behind them.
Quite the contrary, and here's an example:
https://deu.xhamster.com/videos/hd-video-31-8520108
(peeing scene around the 37th minute)
I've also noticed that some of CzechAmateurs videos contain peeing scenes as well as there are at least five of FakeTaxi episodes that I know of (e.g. the one with Tina Kay). I'll post them as soon as I manage to once again find them. Unless, of course, someone will be quicker
Keep sharing your findings and best regards!