I just realized that when I talk on the phone I also walk around and I prefer being alone in the room. I guess it helps prevent me me from focusing on my stutter too much just like you said. I know some people would prefer if the listener completed the sentence for them when they get stuck which is completely fine. I don't like it because when that happens I don't feel like talking a lot after it. You know that moment when you've been having a good time talking and socializing and not thinking about your stutter much but then something happens and your "social battery" is now discharged and you don't feel like socializing anymore. This situation triggers that for me. I'll get stuck on a word or a sound and someone will complete my sentence for me and I'll feel like I'm taking too long and wasting everyone's time. Then the conversation will move on and I'll not feel like talking anymore. This causes me to stutter more than usual for the next few days and I'll need anywhere between a few hours to a few days before I get back to that "having a good time talking and socializing" mindset. I'm not saying that anyone is at fault in this situation. It is what it is.