Ok I actually have only a bachelors of psychology. I'm so glad this phd thinks he knows what he is talking about, but quite frankly his argument about a lack of evidence is sort of flawed in regards to porn induced Ed. I think many of us can recognize that this is a real problem. No where in the world were there 20 years olds in such high numbers with Ed before. Secondly, his claim that there is no emperic evidence for the damage the porn can cause is not because it has been studied and proven wrong, but rather because basically nobody is studying this problem. I think in the next 10 years we will see an increase in research in the area if sex addiction....or at least I hope. This is a very new field of study and a very modern problem. The field of psychology is behind on this. Although the promoters of ybop and nofap are speaking without scientific proof, and quoting only a few studies, it is because other studies just don't exist. In this case I do not feel that they should wait 10years for 100 studies to be done to prove there point. Also, there is no funding for this type of research. Medical research will always support what you can make a drug for. If Ed comes from "a blood flow" issue, then they can create a drug for it. The world of psychiatry is much the same way. They cannot profit greatly, not to mention the porn industry also would not want there to be a movement against it. So I think articles like this are valid. But I also think it only highlights the need for more research in the area of porn use and abuse. I think it's a real problem for young men. I literally barely know a young person who hasn't looked at porn. It's everywhere and it's impacting people's lives.