Perhaps based on a poem by Ernest Hilbert? (link)

Or maybe A SPECIAL MESSAGE FROM HARMONY'S WATERSPORTS PARTY? (link)

Or, What You Know by Dave Schindele? (link)

The Yellow River Boys have a whole album dedicated to the subject of relieving onseelf: Urinal Street Station

Finding lots of punk/hardcore and some rap, but I'm imagining that's not the right *stream* to go down...

(Ok, ok, I'll see myself out)