I think the severely autistic person featured on youtube videos under cdfoakley and kgaccount show someone with the "autistic like" behaviors you discuss when it comes to constant humming and those incessant vocalizations.
I am working with a child who is so sensitive to the feel of paper or anything like it with a dry feel, he says. He uses a transparency paper to put under
My son has refused to be fully potty trained since we started when he was a toddler. He jumps around and holds his belly in whenever he feels the sensation