It's a weird bit of asymmetry to the husband-of-queen title being decided on an adhoc basis...
The asymmetry derives from an asymmetry in the titles themselves: the title "King" outranks the title "Queen", rather than those titles being of equal rank. You can't have someone other than the monarch outranking the monarch, so the husband of the reigning Queen can't be a King.
The asymmetry derives from an asymmetry in the titles themselves: the title "King" outranks the title "Queen", rather than those titles being of equal rank. You can't have someone other than the monarch outranking the monarch, so the husband of the reigning Queen can't be a King.