Some sensory seeking autistic children like to chew non-edible items. The extent to which biting occurs differs in each person. Some parents have to cover the legs of their wooden furniture to keep their children safe. As for myself, my habits were a lot more subtle. I was like a gerbil; I chewed entire pencils, water bottle caps, and plastic cutlery.
Friend: Were you at Carlingwood Mall today?
Me: Yeah, how did you know?
Friend: I found one of your distinctively chewed forks in the parking lot.
Yup. It was a known thing. I've gotten better with age, mainly because my friend started ripping things right out of my mouth the second she'd catch me chewing. I'd attempt to dodge it but she was too quick. There are alternative items to nibble on such as chew toys for children on the spectrum for age-ranges way past the teething phase. There are adult versions of these toys but I won't be jumping on that bandwagon. I'm a changed person now. My days of getting my fix from biting things are behind me. I even got an instrument that prevents me from grinding my teeth to keep my gums sober.
Dentist: Bite this mould softly please so that we can fit your night guard properly.
Despite choosing snacks according to texture as opposed to taste, I never overate because I ate slowly sinking my teeth into soft foods such as jello, pâté, cheese, and soft chocolate, to name a few. I've outgrown most of my biting habits...except biting my lips. Sometimes I bite my tongue too but that's not a bad thing. ;)