Researchers were conducting a study comparing the views of men in their 20s who had never been exposed to pornography with regular users. But their project stumbled at the first hurdle when they failed to find a single man who had not been seen it.

Prof Lajeunesse [...] found, [that] on average, they first watched pornography when they were 10 years old. Around 90 per cent of consumption was on the internet, while 10 per cent of material came from video stores.

Single men watched pornography for an average of 40 minutes, three times a week, while those in relationships watched it 1.7 times a week for around 20 minutes.