Whether you've tried (and failed) to plunge a stopped-up toilet or simply enjoy playing Super Mario Bros. games, you've likely learned to respect the artisans behind proper pipe installation, maintainance and repair.
Plumbers battle leaks, hairballs and a dozen other hazards that fall on one spectrum of the Disgusting Scale or another. And they do it while being judged for the state of their behinds. It's not fair -- crouching under sinks and things all day is bound to reveal something to an onlooker eventually.
So here's to you, plumbers of the world. Happy International Plumber's Day. You keep our water flowing and our hands wrench-blister and epoxy-stain free. Here are various comics that may or may not be so reverent.