It was odd - Once gluten free (not long - maybe a couple months? a few weeks?) - I realized, no crunching. Could care less for that ice. I discovered (through discussions with others) that ice chewing is a sign of anemia. And as many of us know, anemia is a symptom of undiagnosed celiac.
Another weird thing - I also craved the smells of lighter fluid, oil based paints, gasoline. Ya, I know, not good. But signs of "something is wrong here."
Years and years of subtle - and not so subtle - symptoms. Symptoms that can be avoided with awareness and correct diagnosis.
Know an ice chewer? Tell them to get their iron checked. Anemic? Tell them to get tested for celiac.