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A study into how porn affects men was dropped - when experts failed to find ANY young men who had not watched it.

Researchers in Canada wanted to compare the behaviour of men who consumed porn with those who had never looked at it all.

Montreal University professor Simon Louis Lajeunesse said: “We started our research by seeking men in their 20s who had never consumed pornography.

“But we couldn’t find any at all!”

However, the research did find that on average heterosexual men first glimpsed porn at the age of 10 years.

Single men look at porn on average for 40 minutes, three ?times a week, while those with a partner for 20 minutes twice a week.