PossiblyAPolarBear Most of the 'significant academic research' is radical feminist advocacy research.You could equally claim that the porn in question acts as substitute to real abuse. There have been 'significant academic research' that suggests that to be the case. It would also appear to be common sense. It's the reason why the 'theists' were against masturbation in the first place - it gave an outlet to the sexual impluse that did not result in reproduction (sex), and a larger following and more money for their churches.
You're right about the UK and the EU also being engaged in the war against porn. It should be noted though that several years ago, the UK actually took pissing off its list of 'extreme porn'.