There is something that changes our stuttering constantly, and we insist on saying "good and bad days are random". It's clear that something is influencing our stuttering and maybe studying this is one of the solutions to our problem, maybe dopamine really affects stuttering because whenever I masturbate I have bad days for about a week! whereas when I haven't done it for more than a week, I'm at my best fluency days. Everything I know is based on my experience.