Few years ago I was banging this woman who watched a lot of porn, one time we were chatting on-line as I tried not to see her more than once a week and we were swapping links to on-line vids, she got super pissy about what I sent her as the chick in it was a different ethnic group from her, so I got the whole 'oh so that is what you rly want then?!!?!?!', she stopped talking about porn after that, still banged her for a short while though.
Though she was super crazy with loads of issues, so whilst the idea of women into porn was novel at first, my theory is that it is a good warning sign of crazy.