Crossing the streams is bad

My boys love to pee outside.  An odd opening sentence I'll admit, but truthful.  They're like a bunch of ethusiastic irrigators, dutifully soaking all areas of the backyard, often simultaneously in some kind of synchronised pattern.  Sometimes they'll hose down some object like a pile of grass or tree.  Its bizarre, and sometimes embarrassing, like the time Jasper relieved himself in front of a jumping castle with a 100 strong audience.  Oddly there was no applause :).
But the hijinks aren't restricted to outside.  Often taking a pee at my house will draw a small gathering of like minded individuals.  Like demented Ghostbusters they cross the streams and terrorise the walls.   At least when they claim to want to be firemen I'll know they've got experience...