While there’s an argument to be made for how porn is corrupted people’s sex lives, in moderation it really just smooths out the rough parts of sex life compatibility without introduction of more partners. Also, sometimes it’s just a matter of wanting to stop being horny or that you don’t have the energy to please your partner. Porn is there to fill the gaps. I mean, yea, you can use imagination, but the reality of the situation is that porn is accessible, and it fills niches that even a great imagination struggles to. I think calling it cheating is daft except in cases where it starts ruining the other partners sex life, but still, calling it cheating is entirely a misnomer.
I love anal sex, my gal tolerates it on rare occasion, but really is squeamish if I so much as look at her asshole too much. She loves rape play with bondage, not really my deal since it ends up being incredibly involved on my end while she in effect does nothing. IMO it’s kinda hard to get off if I have to be an actor completely counter to my real self as well as dealing with knots and shit, even if the scenario is ‘man gets exactly what he wants’, the truth is not so much. Tried anal rape play and that stopped in pretty quick after the second plug. So, porn is there to help fill in the gaps for us and out fantasies. Not to mention, her sex drive literally runs circles around mine. On the rare weeks I keep up my dick feels bruised. So, why shouldn’t she watch something to help scratch the itch I don’t always want to? I certainly prefer this arrangement over the alternative of actually cheating.