It does look odd. And I say that as someone who used to flap their hands a lot, when I was excited.
I've managed to tone it down now, to the same sort of gestures that NTs use. So I'll rub or 'wring' my hands rather than flapping them. Will still tap my feet when I'm concentrating, and scratch my head when I'm stressed, but these things are more acceptable and go largely unnnoticed. BTW I'm 34 years old.
It takes a lot of determination and practice to look 'normal'. Whether you want to do that is, of course, another debate entirely.
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The Sociable Hermit says:
Rock'n'Roll...