Never talk to myself not out loud at least. Unless getting mad and saying or damn counts. Was working with a guy for one day last summer he was on the opposite side of this little office in the building we were at, for hours I heard this conversation and laughing going back and forth and Im like damn sounds like this dudes having a good time. Finally I was like I gotta see whats going on, I walk around the room, its just him talking back and forth laughing and giggling in multiple voices. Don't know if he was just trying to fuck with me or if that's how he normally is. Im basically freelance so I often don't work around the same people on a regular basis. Ive wondered ever since then if he is really just a nut case.