The distinction between art and pornography is notoriously elusive. Many of those who condemn "porn" seem also to believe that sex is bad as such, unless redeemed by some approved thing - eg marriage, or love, or something. I have no time for that attitude. Some who defend art that is sexual (or otherwise apt to be attacked by some as "porn" seem to feel that artistic merit is a sufficient defence to an accusation of pornography. I suspect that that may be to go too far.