I am editing an earlier comment, but men need to understand this;

Masturbating from high speed porn is biologically the same process as sex or porn magazines. The mechanism ruining you isn't the act of cumming itself. It's the novelty you can get in porn by scrolling through Pornhub searching for the ultimate clip to cum to in the moment. The dopamine reward circuit is better called the 'search and find' circuit. Dopamine is released in the process of searching ie. Searching through porn, pulling the lever on a pokies machine, scrolling your FB feed, etc. Your feel good hormone is released once you get what you want but dopamine is released beforehand during the expectation of getting that feel good hormone. It's dopamine telling you you're doing a good thing for your own survival and it's supremely addictive. We have this circuit from our time as hunter/gatherers and searching for things like the ripe berry in the tree. The dopamine circuit engages our memory in the process and would help us remember where we found the tree, how we climbed it and how we determined which was the good testing berries. Dopamine also helps drive our creativity in how to easily get the berry next time with less effort and find more. Porn and other super stimulants like junk, food, hard drugs and social media work on this same system used to motivate our ancient ancestors to hunt and create.

High speed porn usurps the dopamine reward circuit exactly the same way as heroine or crack cocaine does and harms you in much the same way but to a less extreme degree. The process is your brain develops a tolerance to dopamine and what SHOULD be enjoyable to you, such as; basic social interaction, living in a tidy environment, cooking a good meal, learning something new (etc etc etc) all becomes dull and uninteresting. You eventually put yourself into an emotional rut every time you're not sitting in front of your PC masturbating and it rewires your dopamine circuit around chasing porn highs rather than doing productive things in your life that have long term payoffs like developing genuine friendship networks, cleaning, studying, chasing a promotion at work, etc. By opening a new tab to go to pornhub and scrolling through searching for the best clip to jerk off to you are fucking with the chemicals in your mind that motivate you in everything in life. It's seriously that simple. Dopamine is the driver of all your choices in life and high speed porn is fucking with it.

If you think about the stereotypical drug junkie, how do you imagine them? Cops know how to pick drug dealers on a street because their front yard is a mess, their car desperately needs maintenance and is leaking oil on the driveway, inside the car is filthy too, the dude is lazy and wants to sit around all day, doesn't really look after his kids etc. Most people don't know this but it's the drug addiction that has completely fucked with their dopamine circuit which motivates them to do anything in life. High speed porn is also a super-stimulant on dopamine but think of it like heroine-lite. You feel less motivated to do anything in life.

If you've heard about nofap youve heard about claims of people feeling like they have superpowers after 3 months of it but really it's just their dopamine circuit resetting back to normal giving them loads of energy to chase things in life like real women and personal development. That's all. It's something theyve never felt before because they started on high speed porn at such a young age. Once they quit porn they exist in a frame that they've never felt before, like someone looking in color vision for the first time.

There are also secondary problems with over-stimulating from dopamine like through porn/drugs and it reduces grey matter and also fucks with your frontal cortex. The frontal cortex is what controls your ability to judge risk and your self-control. It's why junkies have this stereotype too. They weren't usually like this before addiction, the dopamine fucks with the frontal cortex. But your brain is plastic and all this stuff can heal by itself with time abstaining. The key is to not link your dopamine circuit up with any artificial dopamine stimulants like junk food, social media, gambling, drinking etc. High speed porn is one of the worst super-stimulants but falls short of hard drugs.