When I saw this comment I was confused, because I get the reference (from restaurants) and hadn't heard this origin. Then I followed your link and got more conf

When I saw this comment I was confused, because I get the reference (from restaurants) and hadn't heard this origin. Then I followed your link and got more confused, because it doesn't mention graves at all. I think perhaps someone made up an origin, passed it on to you as fact, and you assumed that wiki would agree without checking?