Par4QC Hate to be 'that guy,' but most of this is not true. Golf is not and has never been an acronym. It drives either from an old Dutch word for club or from an old English word for 'to strike.'
There was never a law in England about beating your wife with a club no thicker than your thumb, and that's not why we say rule of thumb.
There is no agreement on whether the kings in a deck of playing cards were originally meant to represent actual individuals, but there is general agreement now that they do not.
Honeymoon has a complicated history, but likely the word honey was used to mean sweet, rather than to represent mead. The word first appeared about two hundred years before it came to signify it's current meaning.
Your derivation of sleep tight may actually be true.
