I'm not sure this has been demonstrated academically. https://www.springer.com/about+springer/media/springer+selec...

"Most significantly, they found that the number of reported cases of child sex abuse dropped markedly immediately after the ban on sexually explicit materials was lifted in 1989. In both Denmark and Japan, the situation is similar: Child sex abuse was much lower than it was when availability of child pornography was restricted."

(I must admit I haven't looked into it much however, you will have to decide for yourself how much you trust Diamond M et al).

However, anecdotally, after I masturbate to pornography my desire to engage in real-life sexual activity markedly goes down. That is the point of masturbating to pornography, isn't it?