I'm sitting on the couch watching a cartoon with Motormouth. Out of the blue he chuckles and asks "Do you have Autism or something?" Startled, I look at him and say "are you talking to me?" Equally startled, he looks at me and says "no, I was talking to Popeye." "Why would you ask that?" I ask. "Because Popeye talks to himself" he replies.
I think the fact that the two of us were startled by the idea that the person sitting next to us would actually talk to us is more of a indication of Autism than talking to yourself, but what do I know?