...to your rant.
You conflate two instances of controversy from the 80s. The "crucifix in a jar of urine" you refer to is a photograph by Andreas Serrano called "Piss Christ" (have you ever seen it?).
Robert Mapplethorpe produced elegant b&w photographs, some of which documented his participation in the BDSM community. His show raised hackles from the conservative art police types in Cincinnatti, OH and led to a brouhaha over NEA funding of controversial art.