I actually did a test like this when I thought I was having POIS versus pmo addiction. The guy who ran the group said "if you want to know which problem you're dealing with, try watching porn without mastrubating." It was genius, because I did that multiple times and days later still got the weird anxiety, depersonalization and brain fog symptoms. Although an actual orgasm with porn makes me feel way worse than just watching porn, taking weeks off of porn and then orgasming I feel much, much better. It's the porn. Definitely.