Just talking to yourself is frowned on, unless, you are watching sports, gambling, fishing, working on a machine, and a bunch of other places where while involved in an activity, people talk to themselves.
Talking to yourself is wrong, but talking to a bowling ball rolling toward the pins, doing a flapping and wiggling body English dance, is normal. Crowds at sports put aspies to shame. 50,000 gather to talk to themselves. If I yelled, screamed, talked to myself, usually in extreme emotion, jumped up and down, hugged strangers, when a new book came out, I would get locked up.
I do not care what others think, I talk to myself because I like the company.