Otherwise, it's over. My husband treats me better when he thinks I am cheating. Because you are dressing sexy and looking good and acting alluring. No one appreciates what they take for granted. No, unless it involves cruelty or children.
Normal pornography is good for a marriage because it injects spice.
Men are different from women. Women like romance, relationships, and diamonds. It's different, but pornography can add a lot to a marriage. For the same reason that married men engage in masturbation. It's a way to increase sexual stimulation without cheating and remaining faithful.