I feel the exact same way. When i’m being coocky or when I’m extremely angry i stutter way less. It got to a point where i started saying whatever came to my mind. I was an asshole to everyone, even a girl i started talking to. It ended that relationship and i made many enemies at the cost of not stuttering. There’s a fine line between not thinking about your next words so your fluent and being an animal. To me it was so fun being able to say whatever i want but it’s cold.