Right, I also do! I also do strange noises and sing random melodies while doing certain tasks. I don’t know, I can’t even control it, I just do it. Sometimes I notice that I’m doing noises and I try to stop, but I continue making them
Posted here before, but the amount of time I talk to myself out loud is increasing. What I noticed though is that I don't actually talk to me but to another imaginary person. I actually find it difficult to not imagine myself speaking with a friend or acquaintances.