Imagine the argument that professional boxing leads to male violence on the streets. First, it implies that people do not know the difference between a piece of entertainment and real life.
There are many assumptions behind this argument. The causal link between pornography and rape was first popularised by anti-porn feminist Andrea Dworkin in the early 1980s, who asserted that watching consensual sex, whether violent or not, encourages and excuses men to act out rape in their own lives.
This is something Cameron should bear in mind as he uses the fear of sexual crime to bolster his case for a crackdown. It is with dismay that I see some women's groups have welcomed David Cameron's drive against simulated rape in pornography.