Actually I meant something like literature or art which is classified as pornography due to it's transgressive nature. I read books and have art which is classified as pornographic yet it isn't necessarily about two people engaged in coitus.

You said you were once with a woman that didn't like you watching porn but knew you did it. I think what most women fear is that men turn into blithering idiots when they watch porn, lustfully craving for the porn whores and willing to spend their last dollar to be with them. As soon as a woman senses competition then you get the scenario where you're given an ultimatum or she leaves.

As for your problems: I believe it's up to you. You can give up porn to satisfy this girl if you think she's worth it (a few people from here did and left forever). I just really think the whole sneaking around thing is kind of silly though it's probably the route many resort to.