Several countries have in the past banned ruling queens, but lacked any requirement that the king be male. This led to King Anna of Poland, and King Mary of Hungary.
@Leon_In_Your_Area Somehow it looks like he's actually laughing (and trying to cover it) because this is Unishment, not Punishment. (Though Sweden disagrees)
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Sweden: 'No, Denmark...this is why we were fighting in the first place.'