When I was very young, I started to quietly say "I want to go home." I do not do it much now, but I used to say it anytime I was annoyed, angry, scared, sad, or bored, regardless of whether I was home or not. Now I tend to say "Wait." or "stop." if I feel overwhelmed.
I made efforts to stop doing it because I thought it made me seem insane, but I used to repeat many things when I was upset or bored, and they rarely made sense in the situation. I do not normally think in words, and when I am deep in thought or highly bothered my spoken words make little sense, if I speak at all.
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While Mr. Kim... has fallen prey to the inexplicable need for human contact, let me step in and assure you that my research will go on uninterrupted, and that social relationships will continue to baffle and repulse me.
- Dr. Sheldon Cooper (TBBT)