I know that a lot of Redditors are anti-porn (outside of porn subreddits), but I figured I would post this anyways.
Sex had become less and less frequent over the past year or so. I went through the checkboxes and couldn't seem to figure out what the problem was.
As sex became less frequent, I started to masturbate more. I wasn't necessarily hiding it, but I am alone enough of the time that I was able to masturbate when home alone.
A few months ago, like usual, my wife said no to sex while we were laying in bed. I was extremely horny and told her "I'm gonna go masturbate". This is the first time I had said such a thing to my wife. When I got back to the bedroom (this happened at night) she asked me if I watched porn when I masturbated. I said yes. She asked me what I was into. I asked her the same and I discovered a lot about her that I never knew. She is a fairly innocent person and she does not watch porn often at all but there were certain genres she was definitely into. I think perhaps it just took this conversation for her to open up and be honest with herself/me that she did want to watch porn a lot more.
We've started watching porn together while having sex and it is the hottest sex we've ever had together.