Researchers in Canada wanted to study the behavior of men who watch porn versus the behavior of those who don't - but the study had to be cancelled after they couldn't find enough men who haven't seen porn.

The Canadian team were looking for young men in their 20's who have never seen any kind of pornography, but were unsuccessful in finding any.

They found that, on average,  most men first saw porn when they were 10 years old and that the average single man looked at 40 minutes of porn three times a week.

Those in a relationship cut down to 20 minutes a week.

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