For a king's castle, the security leaves much to be desired. The king, being a former hero, can look after himself, but isn't he worried someone might kidnap the princesses for blackmailing purposes?
It is a translation issue. This joke works in English, and doesn't work in any other language I know.
And even in English, it could be avoided. WN translation uses "heavenly fowl" instead.
For a king's castle, the security leaves much to be desired. The king, being a former hero, can look after himself, but isn't he worried someone might kidnap the princesses for blackmailing purposes?