Wrong Planet is a goldmine of interesting topics.
I am a very analytical person who often engages in external echolalia (talking to myself after hearing something interesting spoken either by my IRM* or another human being). I can have quite the dialogue/monologue(nanologue?!) . Sometimes if my voice gets a little excited I open my cellphone and pretend I'm talking to someone. Most NTs are extremely intolerant of the eccentricies of those who are different, including those of us on the Austism Spectrum. I have had supervisors/co-workers complain to Human Resouces about my behaviour, which has been a partial reason for my current unemployment.
However, this is part of who and what I am and I am not going to apologize. We should not have to.
*Internal Role Model (IRM)