many years ago, while traveling in southern Missouri, near New Madrid, a friend & I got a demonstration of the 'line'...

One morning we ate at a restaurant that did not offer grits...the next day, 30 miles further south, they ASKED you if you wanted grits....the 3rd day, 15 miles further south, the grits appeared on your plate automatically!

(similar things happen with BBQ sandwiches and coleslaw in various areas of the country)