I am sure most of us have refused to eat something because it is too hot, too salty, too sour, too fattening, ... etc, but have you refused to eat something because it is too hard on your teeth?
Yes, no, don't remember?
In today society, I don't expect this happens very often, and I don't remember any specific cases for myself. However, I am pretty sure I have refused to eat something due to the hardness. I will say, most recently, I almost gave up chewing my cane sugar because I bought some really hard ones.
:) This is not me. I just want to illustrate "chewing cane sugar"