Maybe starting with Oswald Danes does not give the full picture of what urine is. The lead should speak more to what this substance is, and where it comes from. In other words, context has to be given by the time you're talking about urinating on a shop's front window.
Urine, colloquially referred to as piss or pee, was a substance that Oswald Danes claimed was put in his food in jail. Although they covered it with things like cream and gravy, he could still taste the urine, for, as he put it, "[piss] has a way of enduring". (TV: The New World)
In 1782, Lisa-Beth Lachlan noticed that the regular customers of the Shakespeare's Head tavern in London often urinated on the floor, leaving wet patches which the posture-girls had to avoid as they struck their obscene poses. (PROSE: The Adventuress of Henrietta Street)
Before meeting the Eighth Doctor, Anji Kapoor and her boyfriend Dave Young visited a statue in Brussels called The Mannikin Pis, which depicted "a naked little boy, happily urinating into the air". (PROSE: Escape Velocity)
In a timeline created by Faction Paradox, Sarah Jane Smith "had to take a pee behind someone's house" in the town of Anathema on the planet Dust. She doubted that anyone there would have cared if they had seen her in the act, and noted that "she'd never had to think about these little biological details on most of the planets she'd been to." (PROSE: Interference: Book One)