A recent study by the University of Montreal had to be cancelled due to the lack of participants or the inability to find them.

"The objective of my work is to observe the impact of pornography on the sexuality of men, and how it shapes their perception of men and women, explains assistant professor, Lajeunesse. We started our research seeking men in their twenties who had never consumed pornography but we couldn't find any."

"Guys who do not watch pornography do not exist," said, Lajeunesse.

So instead, his study examined the habits of 20 university students who consumed X-rated material and the impact on their sexual identity and how it shapes their relationships with women.

He found most boys seek pornography by age 10, at about the same time that they become curious about sex. They chose what they wanted to see and quickly rejected what they found offensive for example, bestiality or violence.

About 90 per cent of pornography is consumed on the Internet, while 10 per cent comes from video stores.