Well, it seems that you don’t have the internal monologue as a mandatory part of your everyday life, instead using it sporadically as a helping instrument — which also translates to you not using it when reading, for the most part.

Although it seems weird to me that you’re using narration for conceptual things, and not ones describing tangible stuff. Since you’re a borderline case, you might want to commit yourself to one of the neuropsychology departments, for us normies to study what the hell is going on in your brain.