This reminds me of a book I read, though unfortunately I can't remember the title or author. The author's son, who was eventually diagnosed with PDD-NOS, would speak in a metaphorical way, referring to favorite t.v. show scenes to convey emotions. His mother understood it so well she was surprised when he went to school and people found it confusing.
Mentally protecting yourself sounds very clever and somewhat like the "visualizations" some people use.
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Sharing the spectrum with my awesome daughter.