“Don't Touch” is an unspoken warning in any art museum. Sometimes an institution might post a sign explaining to visitors why touching the art on view is bad—not just for the obvious catastrophic reasons, but because even oils from hands that appear to be clean can cause incremental damage. Mostly, though, visitors already know what they are (or, rather, aren't) supposed to do in art's presence. Touch is a privilege typically reserved for the artist who made the art, as well as its professional caretakers. In fact, “the artist's touch” has been a central value in Western art for hundreds of years. Read more at Los Angeles Times.

Installation view, Franz West: To Build a House You Start with the Roof: Work, 1972–2008, LACMA, Los Angeles, 2009