“This is another custom… you’re supposed to have rice on the left side of you, and soup on the right side when you serve it. Don’t know the reason, but maybe because you eat with your right hand.”
The informant learned this from his mom. He doesn’t really know the meaning of it, but he doesn’t like it because he think it’s annoying.
This is a custom that is normally taught to kids at a young age regarding table manners.
I think this is part of table manners that are taught in Korean culture, similar to the ways that we have rules about where the bread plate, drinks, or utensils are placed on a table. This creates more organization on a table, and since rice and soups are a common part of Korean meals, they have rules about where they go within a table setting.