You mean that literally? As a baby. I didn't talk then, but I wanted to call out of my mother who had left the room for a moment. I couldn't call her and realised that she'd not come unless I could talk and make her come.
Or you mean just keep talking (to certain people) to a minimum? I never did that. I would get scolded by grandma for not talking to others when I was a kid. I always knew it was important to make people think well of you and to get favours done.
No talking to others makes them take a dislike in you. I was taught that from kindergarten age on.
Or do you mean realising finding friends means finding contacts for hobbies and jobs? I'm not particularly interested in social relationships. But I let people be friends with me if they want, and I came to like it. I just don't know how to make them and I'm not searching out any unless I have a specific reason or want to pass time because I'm bored.
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Autism + ADHD
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The trouble with having an open mind, of course, is that people will insist on coming along and trying to put things in it. Terry Pratchett