I work night security in a hotel in a large European city. I can tell you that when I am doing my checks of the building, at least 2 or 3 times each week I will find someone pissing. In a corridor, on furniture, on the stairs, in a lift .......... It's all normal. Guys are better because they can spray it around and make more mess. Girls just piss in one spot. Never be ashamed - just piss where you like.