[NSFW] If you know or suspect your partner view porn are you enraged, ambivalent, or OK with it?

[Maybe NSFW] Off this question this question, I wondered how people feel about their partner watching porn. I have heard here and in person, mostly women about their men, how they felt if their partner watched porn via DVD or online or possessed girlie mags. If your partner was viewing porn are you enraged, ambivalent, or happy that they watch it? Do you feel because you know your partner views it that they are lusting over the women or men who are performing or would rather be having sex with them over you? Do you feel when you are boinking them that they are thinking and imagining they are with one of the porn stars than with you? Does knowing they view porn threaten you? [NSFW maybe]