The show “XXX,” currently playing in London, is said to be shocking and sexually explicit to a degree not seen in the London theatre. “At a time when there’s no shortage of dildos and bare butts (even bare butts that you might know) on TV, it seems that flesh on the stage is still peculiarly ‘real’. Which is, you might think, an argument for the power of the theatre. But not for this show. Of course, it shouldn’t be banned: all you have to do to avoid it is not to go. But it is a con: it’s commerce mas querading as taboo-breaking creativity.”