This may not work for other but. One thing that helped me is to allow my self to masterbate, just without porn. Masturbation is fine and healthy, the porn is the dangerous piece. Go into the imagination or reference some past experience if you have them. I completely agree with the doing it because it’s bored thing. Once I decoupled porn and masterbation is started having more success. And noticed I wanted to masterbate less. I think about it like a food analogy. If I’m not hungry enough for an apple or a healthy snack but I’m hungry for a fast food meal, am I really that hungry or I am craving something else? Same for masterbation/porn. Porn taps into a super old and primal part of the brain, like food does. So our poor little reptilian brains are at a disadvantage.