No,you are wrong.
I will tell you a top secret.
The REAL REASON because traditional porn is a bad thing for your brain isnt the "dopaminergic trouble" or that shitty reason about dopamine receptors.
Real reason is real man get a decrease in his manhood when see the erection of another boy.
What?
Ayurveda says something similar regarding of the nature of homosexuality. And the dopaminergic factor is just and false reason to fight with the depression of being a repressive homosexual because your constantly seeing the erection of another man.
Its a serious wise-tradition.
Main point,I believe that the erotic no hardcore stuff,could be a good thing. The trouble with hardcore is the explicit factor as you see,precisely.
cheers