I started cruching ice when I was pregnant with my daugher (who is now 5 1/2). I've been told it could be b/c my iron might be low. I had my iron checked and my iron level is normal. Then I read that it's a sign of sexual frustration, which explains a lot lol. My boyfriend moved to Myrtle Beach, SC in June of last year and we don't see each other often so that might explain my ice crunching. I don't do it often, but it's enough to call it a habit. I had stopped for awhile but started back up again.