I didn't cover Endrass et al specifically (it is referenced indirectly) as it relates to actual child porn, which as we know is not ethical, therefore it's more interesting as part of a suite to debunk anti porn arguments than being interesting in it's own right (where the most it has to say is that someone who views that tend to have different characteristics from actual abusers).

I am aware of it though.

Also, I don't really want to lump people who don't engage in actual child porn in with those who do as I don't think it would be good to invite prejudice upon good people.