One of the big problems with doing research about the effect of video pornography on people is its hard to find a control group. Not too long ago a researcher from the University of Montreal wanted to study the effect of pornography on men, but he said when he was looking for a control group of men in their 20s who had never consumed porn, he actually couldn’t find anyone.

But there was a study that was done in the mid-80s, before the dawn of the World Wide Web, and the results are fascinating.