It is exhausting, and I do it too. It's because of being hypersensitive to visual sensory input; other people will not notice my expressions unless they are way, way, way exaggerated, even though I certainly notice theirs. One reason I find you and Ruth and my other partners so relaxing is that I don't have to exaggerate as much.

I also feel as though I'm shouting when I talk at what I am told is a reasonable volume.