Do you find that participating in Fluther triggers over-stimulation signals?

I will sit at the keyboard and type a sentence, or a portion thereof and redo a word or two and then finish it. I’ve noticed that I sit tighter, drum my fingers on the keyboard, pick at the edges of my fingernails to make them click, etc. I remember doing this when I learned to program, decades ago. Anytime thinking is required I do this. I describe them as over-stimulation signals, does this seem right? Does anyone else have odd habits in response to intellect stimulation?