My friends in Switzerland 30 years ago thought corn was only for animals. It took some convincing for them to try American-style corn on the cob (which is delicious!)
Edit: probably not a good idea to eat rat at home. Or tortillas. Or anything delicious that is culturally forbidden.
As a taco/tamale/posole/hominy fan, I agree with you and am ashamed of my insinuation. I'll strive to do better.
Edit: [1].definition#3> a cereal grass that is the primary crop of a region (such as wheat in Britain and oats in Scotland and Ireland)