The talk plays out strangely. Koons speaks slowly and methodically. In conversation with the museum’s scientific director, Prof Panagiotis Iosif, he expounds on diamonds, sperm, membranes (he often talks about membranes), balloons, animal intestines, meaning, Bob Hope, Raphael, multiple universes, and why he loves coming to Greece because of the islands, museums, food and mythology. All the while, a slideshow rotates behind him with pictures of artefacts that look invariably like dicks.