AQUARIUS (Jan. 20-Feb. 18): Germany's Ostwall Museum displayed a conceptual installation by artist Martin Kippenberger. Valued at $1.1 million, it was called "When It Starts Dripping from the Ceiling," in part a rubber tub painted to appear as if it had once held dirty rainwater. One night at the closed museum, a new janitor came in to tidy up. She scrubbed the rubber tub until it was "clean," damaging the art. Let this be a cautionary tale. It's important to appreciate and learn from messy stuff in your life – even admire its artistry – and not just assume it needs to be scoured and disinfected.