I disagree, respectfully. But we can agree to disagree. To me, talking to other women sexually, which is commonly what porn leads to, is a form of cheating on a partner (live web cams are readily available and it is too tempting for someone who is already viewing porn to not try it) . And it is my belief that there is no place for porn in a committed relationship if one person is not comfortable with it and if it makes them upset and insecure. People make compromises for each other in a relationship. So I disagree with both of you.

The main point is, the OP is not comfortable with it. Her feelings are valid and she shouldn't be with him if he needs to use porn so much.