I don't recall mentioning that there is no correlation between porn and erectile dysfunction (ED). I do not wish come across as patronising (sorry if I do), but "numerous stories of guys" equates to anecdotal evidence, which is not held in high regard in science and medicine. To be respected in any of the hard sciences — including physics, chemistry, biology and computer science — you need to have empirical and numerical data to support a hypothesis (which can be verified and reproduced in subsequent experiments). I think it is important to disentangle masturbation and porn. I have no doubt that excessive daily masturbation can cause ED whether or not porn is used. There is no hard evidence for the existence of porn-induced erectile dysfunction (PIED); that is, PIED remains a controversial term in science. How do you know for sure that porn is to blame for the ED? What is the evidence (other than anecdotal and/or subjective) that it is "excessive masturbation + porn" that caused the ED? To reiterate, could it be that simply excessive daily masturbation can cause ED whether or not porn is used? The following is a possible methodology, which could be employed to prove or disprove the existence of PIED. There would need to be a controlled study of: 1) an "excessive masturbation + porn" group versus 2) an "excessive masturbation only" group to ascertain if ED happens in both groups or not. If both control groups show equal values in terms of the frequency of ED, then this would prove that porn is superfluous for ED. In other words, this would disprove the PIED hypothesis.