But you wouldn't know it by the thousands of visitors at the Erotica exhibition at Olympia. Naomi Ryan during Erotica 2004 Exhibition at Olympia in London – including sex and fetish shops, sexy nights out and saucy shows. Secret history of sex: welcome to the molly house. Posts about Historical erotica written by Alex Cochrane. London looks amazing in a wet t-shirt in the New Year?