Girls feel that their boyfriends are trying to compare them to the women on screen. It is pretty much an insult to a girl if she has a boyfriend that watches porn all the time to get off with his only excuse being, "You weren't here and I swear I was thinking about you." I think that if a guy has a girlfriend that he can physically have sex with, they don't need to watch porn because why watch something you can't have? It is basically a self conscious thing. A lot of girls, like myself, feel that we aren't good enough or pretty enough for our boyfriends when they watch porn to get off. It wouldn't be as big of an issue if they didn't lie about watching it. It is horrible to know that your boyfriend is fantasizing about being with another woman rather than with you. I know its a guy thing, and it will never stop, but have some respect for your girlfriends. Instead of jacking off to porn all the time when you could be having the real thing, go have sex with your girlfriend, give her some ideas, but NEVER compare her to a woman in a porn because she will feel pretty much worthless.