As a guy who watches wayyyy to much pornography, I have a few things that might help you on this.

Some times guys also do this as a way to make them selves feel better or because they are so accustomed to it. Perhaps as far back as high school your husband used porn and at a time it became addictive but i have felt my interests and stuff change based on porn and it freaks me out to the point where i dont even know what I like anymore. I cant tell if im straight or not, i cant tell which women i like, and women who i used to like for some reaosn i dont like anymore which is awkard.

This is something you need to talk about right now.