I have a tendency to not be able to speak coherently. I developed what I’d call a disability from a lifetime of not being able to speak my mind for fear something terrible would happen. As in, I would "make someone mad" or they wouldn’t listen.
After a childhood of staying as small and quiet as humanly possible???— my ability to speak worsened. I got in a habit, in a 7 year long relationship, of shortening what I said because "he" didnt have the patience to listen. Therefore, I had to get out what I had to say quickly.
When I escaped the relationship and met people that did listen to me, it became embarrassing because I thought so much before I spoke and I didnt know how to speak my mind.