that’s a thing, sure, but at least personally most of the time it’s neither of these, it’s “i have so much knowledge of this topic lodged inside my brain that it’s fighting to escape and i have a profound need to talk about it to others, and there is no greater joy in life than having a person ask follow-up questions”

You forgot about the part of option 2 where you realize midway through explaining that the other person either understood and you misread the situation, or they just don’t care, but now you’ve gotten too far into the explanation and you just have to power through even though literally every fiber of your being is telling you to shut up

… wait