As a society we need to move past this ridiculous idea that the enjoyment of sex, including sexual fantasization and pornography, are something to be ashamed of or feared. Sex and porn are normal parts of a healthy, adult sexuality.
I'm not sure how solid any of the conclusions are, though, and I don't know what the ED research would be referring to. Here's one (slightly dated) meta-analysis that does find some association with aggression, especially following watching porn that involves violence: http://onlinelibrary.wiley.com/doi/10.1111/j.1468-2958.1995....
This is the kind of statement that should really be carefully evaluated. Smoking was "normal" once, too, along with many other unsavory bits of culture we have now moved on from.
See: http://www.psychologytoday.com/blog/cupids-poisoned-arrow/20...
Basically, show some solid evidence. Otherwise it would seem that you are taking a moral position on this, not a scientific one.
IMHO, the article you linked to is about as enlightening as an article saying that overindulgence in cakes and cookies is harmful. Well duh! In normal, moderate consumption both cakes, cookies, and porn are completely normal and healthy.