My ex compared me to a rooster once, and said she thought it was adorable (and not in a rude, condescending way either, because she believes she's autistic too and is currently seeking a suitable diagnosis for it other than "Social Anxiety Disorder"). I also press the back of my tongue against my soft palate when I get excited, and sometimes when I get really excited, I make a rather peculiar sound sometimes that I can best describe as a delighted squeal. These stims really only occur when I'm walking and getting excited about something, though. I also rock and stim a bit when I'm listening to music (especially Opeth, I've noticed).
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"Works of art make rules; rules do not make works of art."
-- Claude Debussy