Nothing is more likely to inspire us to see for ourselves than a warning about the effects of looking. Take the media interest this month when it was revealed that the British Museum’s exhibition, Life and Death in Pompeii and Herculaneum, is to include a “parental guidance” notice. The reason? An ancient marble sculpture of the god Pan (a part-human, part-goat figure) having sex with a she-goat is not to be segregated, as it has been since its discovery in 1752, but displayed openly with the other exhibits – a liberal move by London, if also one which dulls the object’s impact. Getting this story into the news ensures that centuries of censorship are not swept under the carpet, and that Pan, and the show he speaks for, remain “hot property”.