I can't help it, but every time you start talking about hauling poo, I'm reminded of a video game that #1 son had for the N64 called "Conker's Bad Fur Day". It had some parts in it that weren't exactly 'kid safe' but he was 12-13 by then and there really wasn't anything in it that he hadn't already heard buy that time.
One of the 'bosses' was called "The Great and Mighty Poo", and the battle with him was hilarious. especially the "Opera Song" he sings.
Here's a link to a video of it. Be warned that the "S-word" for poo is used in it, so if you find that offensive, please don't click on it.