My psychotherapist believes it’s emotionally related to not being allowed to verbally express my wants and needs. There wasn’t any other overt family violence but I was ‘discouraged’ from expressing myself, requesting my needs , opinions, or desires. Additionally, there was a physiological genetic factor stuttering can be a family trait. The dopaminergic pathway can be damaged. In my case it was a perfect storm of emotional abuse and genetics. I had the gene as well as parents who didn’t give a damn about what I needed or wanted.