First off, I don't *love* porn myself, but it is not abnormal or wrong to have an interest in it. So what if something besides your fiancee makes you horny? Its biology. As long as you are not cheating on her, I don't understand why you feel so bad for looking at it.....it's just normal sexual behaviour. You say you don't 'want' to look at it, but honestly I think you DO, you just have this stigma attached to it that tells you it's bad and that you re a bad person for enjoying it.

My bf looks at porn, and it doesn't really bother me. I cant be there to provide him with sex 24/7, so if that's what he needs to get off, then fine. When your fiancee becomes more secure in herself and your relationship (and please don't take this as an insult to her - I'm sure she's very nice) then the porn issue won't be so big. This usually seems to be an issue with younger, less sexually experienced people/couples, from what I've seen. I can't tell you how to stop doing it, because you won't be able to unless you TRULY want to.