Nah, to be perfectly honest, you're looking for excuses. More specifically, you're shifting the blame. You're rationalizing your behavior, and actually blaming it on your wives or girlfriends. You'd be better off if you just admitted you like porn.
I don't dislike porn. I could lie down next to it and go to sleep. I just don't find it particularly arousing, and that really has nothing to do with how much sex I'm getting at home. I don't watch sports either. I think I just lack the spectator mentality, period.
I don't mind watching porn if that is the question. As far as excuse, I am not trying to blame anyone, but trying to describe a dynamic that many many guys I know seem to experience.
Its seems to me that many guys and females do try in the beginning to give the tit for tat as far as attention goes, but somewhere one seems to give more and the other seems to get less.
It could be a human thing I guess, just what is told to me.