>>4901 >>4902 Actually now that I think of it, porn and internet addiction cause lasting (but reversible) changes to the brain, especially the reward centers (desensitisation, hypofrontality, sensitisation, stress-response changes, etc.) leading to an increasing change in tastes seeking novelty
I haven't looked very far into the hormonal effects, but there's obviously some relationship between jerking off to BBC POV or hentai all day and hormone profiles