The act is automatic. My friends know this and express their support for my preference every time we go out. One even went as far as gifting me with rubber-bottomed, artsy ice trays.
But pain had been building up until that week when I could neither eat nor sleep well anymore. I was lucky there was no serious cavity to address, just severe sensitivity that perhaps came with age and wear and tear.
So, no more crunching. Good thing there are compromises such as this -- drinks just on the edge of freezing.