PS, someone said that if it's a problem, 'just don't do it!' Respectfully, that's like telling an alcoholic or a smoker 'well just stop' and expecting that it's just that simple. You have to have been addicted to something on a chemical level to know how tough the process of freeing yourself is. At the moment of orgasm, dopamine and other neurochemicals get released in the brain, and an orgasm junkie is actually hooked on those chemicals, more than the physical sensation of about ten seconds duration. It's chemical, that's why its as tough as alcohol or smokes to give up.
I think that was me. I said ''Just don't watch it.''
With respect, one can give all manner of things up if one wants too strongly enough. I gave up smoking since I was 14, immediately, at the point I decided 'OK,thats it now. " I also gave up recreational drugs years ago in the same way.
I gave up having another boyfriend and sex (which I enjoyed) - just like that too - because I wanted to focus exclusively on Dhamma study and meditation in non-working hours.
You have to be determined ...and then just let the "addiction" go, with ease and relaxed optimism.
So, no, it doesn't have to be tough, it can be easy. It's dependent on one's mental attitude. No need to get mentally obsessed and attached...just meditate.
You have to make up your mind to stop watching the porn and replace that time with something non-sexual , instead of finding excuses to keep watching it.
The porn industry is known to be rife with crime and drugs and the sex they film is completely loveless and staged.
If its become a medical problem for you, then why not seek help from the medical profession ?
Anyway, hope you can find a solution and sending good wishes.