Widely criticised for its use in the trial of Grace Millane's killer, the 'rough sex' defence is a harrowing ordeal for victims and their families.

An academic studying the gendered influence of pornography urges people not to panic, but to be aware of when – and why – pornography becomes problematic.

The decision brings justice for Grace's family. But in the course of the trial, and the laying out of her sexual history, we witnessed a mirror of some of the worst elements of our society.