"The purpose of art is to elicit emotion, is it not?
"But while emotion is a humanly interactive experience, the vehicle of art is strictly one-way. It is the cruelest humbuggery to force unattributable sadness, anger, or love upon an observer. We inevitably are left empty, unable to return emotional feedback to an artist unaware of our specific existence."
-- Danny, in the comic strip Nukees by Darren Bleuel, 2008-12-29. (The quoted passage sets up a punch line in the net panel ...)