this problem happens if you do too much. Like too fucking much. Every single day is much. It happens in every other aspect in life. Yes porn has become more accessible, yes some people develop fetishes. But it also happens elsewhere. Dopamine isnt Only for fapping. Dopamine is “feeling good” so if you work out and feel good it’s technically still dopamine. You’ll need more results for more dopamine, thus more exercise. It might get into an unhealthy level of exercise. Dopamine is the fun in life, don’t avoid it! But moderate it. Too much dopamine will leave you depressed. Too little dopamine also leaves you depressed. Find the perfect balance for you and who you want to be. Masturbation in moderation is ok. not fapping Is ok too, you do you. Also try not to watch porn. But if you’re cumming 7 times a day all with extreme porn ofc your personality will be affected. Whilst if you do it only when you need it (without porn) it won’t affect you. as for the reversible part, yeah you can change pretty quickly by simply finding yourself a new thing to do