i read a book about intraverts and extraverts that said extraverts have this thing where if they have a thought in their head, that one thought just repeats until they bounce that thought off of another person. Think about if you ever been out in public and some random person walks up to you trying to talk for some reason. Or the amount of people you see always on the phone, like muhfukka be at the grocery store on the phone for an hour straight babbling about nothing all loud with they homegirl.I've seen some videos about people who lack one, and it made me wonder how the hell is that possible. I understand why it is hard for those of us who do to believe though, since an internal monologue is as natural to us as sleeping, eating, & crapping.