oh, all the time. Its basically my 'stim'. I do it subconsciously all the time, i have chewed my nails right down to the point where i have to wait until they grow a little bit again so i can bite them, as they are so short. its actually affecting my recorder playing! i chew pens and dvd cases, sometimes even books and tables! i got told off in primary school a lot for chewing the table legs.
funny, i didnt think there were others like me
another one of my stims is rolling things on my fingers, like, i would get a pen, hold it between my thumb and a few fingertips, and just rold it continuously back and forth.
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Some people are autistic... deal with it!
Self-diagnosed female Aspie (AS- 171/200, NT- 26/200)