If a day was a 100%, I would utter words out loud for about 10% of it, and the rest of the conversation is in my head…and mostly with myself.
Same are the numbers if I consider my life thus far. When I was a child I was very rowdy, but as I grew older and knew more of life I got quieter and quieter. My mouth seldom utters words, but my mind never shuts up.
It’s not shyness or introversion. It’s not awkwardness. It’s not timidness. It’s just the conversations I have in my head are of a nature that most people are not interested in listening to or discussing. I know this because when I meet a person with whom I share interests, comically, I tend to have long passionate monologues.