Learn how to start a fire the old-fashioned way. What I mean is, the way cavemen had done it way back in the day. It's called the hand drill friction fire method. It's rubbing two sticks together by spinning a stick into a fireboard to generate enough heat to create a glowing ember (like what you see on the end of a lit cigarette).
What does this have to do with masturbation? Well, you have to use your hands to spin the spindle. It is very likely you'll develop blisters then callouses on your hands and they'll be too sore/ rough to use for masturbation. At least that's how it worked out in my case when I learned how to make fire this way.
It took me about a month to learn and I noticed I cut down dramatically on my masturbation because I'd become so obsessed with wanting to learn how to make fire using this method. I'm circumcised and Vaseline/ petroleum jelly was my lube of choice. When my hands were sore and all blistered it was hard to avoid the pain and made masturbating near impossible. Even when my hands healed and I became proficient with this fire-making skill my hands were all toughened up (calloused) and it was extra rough on my penis when I'd try to masturbate (even with lotsa lube). I since stopped practicing the hand drill method as I wanted my soft sensitive computer keyboard hands back, ha ha (This was about a year ago before I knew of porn addiction).
There are tons of YouTube videos of folks demonstrating or showing tutorials on this fire making technique. You may even see a couple vids I've made demonstrating this skill (successes & failures).
Here's a link to search on YouTube if anyone's interested:
I'm thinking of practicing up again to help with my PMO challenges.
If you're half interested, I recommend learning the bow drill friction fire method first as it's easier and you'll get a better understanding of the general concept of friction fire making. For me, learning and practicing various friction fire methods is something I enjoy doing. These are very worthwhile skills to learn and can be a conversation piece when demonstrating around other people (ie. a party). I've since started showing and teaching friends, neighbors, and even to folks at bushcraft gatherings (fellow outdoors people that meet together) how to make friction fires.
Though, one potential drawback mentioned from a fellow hand-driller was his wife complained about his hands being too rough when he touched her. But, if you're single and need to reboot, this could be an option, especially if you're bored (and it's good exercise too). Plus, it relates quite well with being out in nature.