Every day preteen boys around the world are destroying their premature brains by watching stuff that should be 18+ by simply clicking a single button that says "I am over 18". They form lifelong addictions that stunt their emotional and developmental growth at the click of one button. Many of these kids are never the same after their innocence is stripped. You can blame the parents for allowing them unfettered access…
I agree that children should not have access to sexually explicit material and that it can warp their relationships to sex. I also agree that some people have unhealthy relationships to pornography; there are plenty of psychological and psychiatric factors that lead people to engage in disordered sexual behaviours.
But people NEED to stop bringing medical pseudoscience into these discussions. Statements like "[children] form lifelong addictions that stunt their emotional and developmental growth at the click of one button" are neither true nor useful.