An artist should not be allowed to speak about their own work it should speak for itself. I completely adhere to the view that a work should be self-defining, explanations should be included with the piece. For example. a typed essay could accompany a piece but it must be presented as a part of the work. This is the job of the artist, to prepare his/her statement and leave it up for interpretation. It is not their job to wait around for the viewer's reaction and argue points after-the-fact.