This thread is so dumb. Why not just ask her "What's up with that"?. I hope someone sees you do something "weird" and goes and posts it online asking "What's up with that!".
Some people chew gum. Some chew tobacco. Some chew pens and straws. Some chew their nails. Some people chew ice. Now we have people running around the forums afraid this is a sign of cancer. Now some poor person sucking down an ice coffee with nothing but ice in the cup will catch himself chewing the ice and will be like "oh no! I must have cancer!" LOL