Misunderstood holiday songs

bwk: Re: “Good King Wenceslas”

Perhaps things will become more clear if you sing it like this:

“Good King Sauerkraut, LOOK OUT! On your feets uneven . . .”

And the “Winter Wonderland” carol will take on a whole new meaning if you substitute these words for the chorus:

“Walking 'round in women’s underwear”

oh, also, what about ‘Riu Chiu’ that I saw and heard the Monkees sing? it is a pretty song. What is its origin?