ugh .. this again?!?! If it's dopamine then why only fapping? why not any rewarding event? This is actually the biggest problem with this hypothesis. It suggests that fapping is the only "source" of dopamine that can effect stuttering. Why not eating favorite food? Watching TV? Playing a video game? Secondly, it's not clear if stuttering is caused by increased dopamine. People who stutter have demonstrated increased dopamine in the basal gangia (not specifically the reward pathways). We don'g know if increased dopamine is cause or effect. Thirdly, there are several types of dopamine. Which one do you mean? You've got your bias, and that's fine. But, ugh, the no fap evangelization is getting old.