Surely that comes from the same language structure which means you wouldn't say beans and eggs and tomatoes and potatoes, you'd say beans, eggs, tomatoes and po

Surely that comes from the same language structure which means you wouldn't say beans and eggs and tomatoes and potatoes, you'd say beans, eggs, tomatoes and potatoes e.g. in a list of "and" items you only say and between the penultimate and final items?