i think it just comes down to how ur brain is wired. Like how some people's thoughts they actually hear out loud like someone is talking on the inside of their head and other people don't hear their own thoughts, some people might process thoughts better if they actually speak them out loud like operating the part of ur brain that handles speech limbers up the parts that handle ur internal monologue. IIRC you can probably fix this, I used to do it too & stopped myself & dont talk to myself at all anymore