Eye of the beholder
Apparently, eBay is in dire need of some art appreciation classes at a liberal, Liberal Arts college (that may have been redundant) because they failed to see that Glenn Beck's "Obama in Pee Pee" was in fact art, so they pulled the auction off their website.
Read on at Vox Clamantis in Deserto
Brilliant. The liberal meme that Beck's "art" is offensive and "Piss Christ" is not should surprise no one. Not only are liberals brazen hypocrites, they are sycophantic lemmings congenitally incapable of rational, coherent thought.