In The Sex Files Nigel Cawthorne takes us on a stroll through the ideas that made our grandparents turn red. Selecting the highlights from what was deemed too corrupting for public consumption, he demonstrates what made Edwardian and Victorian prudes squirm. We find things that range from the pornographic to the ridiculous, including:

 • Flagellation (for 50 shades fans)

•  Ecclesiastical erotica

• The Trial of Oscar Wilde