Cheeks more than tongue. Don't know why. But will bite same place consistently for a few days. Painful, as I bite hard, usually. Maybe cheek gets 'in the way' whilst chewing! Hate it! Am 'bite free' at the moment. THAT'S a positive!
Yes heaps of times, as well as...My lip! It makes me (gently, sort of) swear to my self & pull silly faces when I do it! but in spite of that, my husband always asks me if i'm alright.