Yes, because I'm always imagining different scenarios in my head of possible conversations I could have with people in the future. Like I'll be mad at someone and imagine myself and them getting into an argument and all the things I'd say to them, and I get so into it that I begin to talk out loud and I don't even realize it. One time I was in the bathroom at school and washing my hands, and I did this and just as a girl walked in I accidentally said something I was thinking out loud to myself in the mirror and she looked at me like I was a proper nut
