I don't think you are overreacting. In fact I can completely relate. It seems this way to men...there is so much validation out there in the media so forth that says "most men watch and masturbate to some form of pornography". My fiance used this statement once and I remarked that of course simply because many engage in a behavior is not cause for justification. The fact that he is able to get an erection with porn may simply be that he's more relaxed because he has no pressure to perform. He can also stimulate himself for as long as is required and feel pleasure and these images will be patient with him indefinitely. That doesn't make it ok, and it still hurts, but its important to remember that...it takes you off the hook from beating up on yourself which is undeserved.