Print by the British artist David Hockney. Neil MacGregor, Director of the British Museum, explores the sexual revolution of the 1960s through a print by David Hockney which shows two men in bed together. The work was one of a series created as the British government was planning to decriminalise sex between male partners over the age of 21. Including contributions by the artist himself and Shami Chakrabarti, director of the human rights group Liberty. (Duration: 14 mins)