I think the harm is that she feels used. I think sex should be a mutual happy experience. If one partner is just wanting sex to sataify his needs then I don't think that is right. In my opinion sex should be about an intimate connection to someone. When else are you really that connected to someone else? Maybe he is bad at sex too. If he is just satistfying his needs that I bet that feels pretty awful. I don't know what it is like from a women's prespective, but it sounds like the sex is a little on sided. Like she is just there as a warm body and not as a partner. I don't know either of you or your releationship.

Do you find the sex satsifying at least? Or is it more you laying there and he does what he wants for a little while until it is over? I think open communication is what would help. I also believe it is ok for you to say no. You don't have to please him everytime he is in the mood. I am one for pleasing my partner, but it shouldn't be driven out of guilt. I wouldn't force my partner to have more sex because I wanted to stop watching porn. You also don't need porn to pleasure yourself. I admit it does help me, but people also need to have self control. It sounds like sex is somewhat of an obession of his. Has he thought about talking to a sex therapist?