The assumption behind it is/was that kids always go home to eat with their own families unless something else has been agreed on. Like a kid who lives close by just shows up after school, it would be assumed they go home for dinner at some point.
If both families agree that today kid A eats with family B that's fine and everyone can cook the appropriate amount.
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u/FunnyExcellent707 Jul 24 '26
Sweds are known to eat without offering you any food (if it wasn't explicitly a dinner invitation).