May 9, 2021:
Even with perfect blood sugar he requires patience. He interrupts habitually, most often before he understands. So that you have to wait for him to finish before making your point.
Yet his jumping in like this isn't rudeness so much as enthusiasm. There's something puppy-like in his eagerness to participate. He's showing that he understands, agrees, and wants to help.
He doesn't realize how competitive he is, and how patronizing. For example in his vision of history I reported to him, when we shared an employer years before. I did not. I reported to our mutual boss, where his rewriting of those relationships betrays his need for superiority. That's fine. I know what a know-it-all I can be with him, so that he has his own need for patience with me, reciprocally, probably just as often as mine.