An old-fashioned something is not necessarily old. An old-fashioned, say, glass-fronted cabinet that was built last week is not old. Its distinctive mode of construction can be said to be not modern, i.e. showing features that were designed a long time ago. Old-fashioned is an opinion.
beautiful old-fashioned wood floors
old-fashioned beautiful wood floors
Try to find the answer in the dactyls and anapests, in prosody, in the system of metrics in which I am hopelessly incompetent.
ladies and getlemen
gentlemen and ladies
The reason is one of prosody.