This is a rather interesting article… I heard this argument some years ago but had forgotten it. Pretty much all of the nursery rhymes we have sung to our children have unsavory roots and were folk songs in their own right, popular among adults before time and generations reduced them to the realm of children… Disney has been a two-edged sword in that they have set this perception in stone while also archiving some of these stories and songs simultaneously. SNOPES pretty much concludes that this explanation of the song’s origins is so much BS, but they don’t really explain why. While they may be correct, so many songs emanating from the medieval through renaissance periods that have survived today (often as children’s rhymes) are metaphors and imagery either meant to mask the true meaning thus prevent punishment for political satire, or simply references to well-known and sometimes amusing people and events of their day; think “Ring Around The Rosie”, and “Froggie Went a-Courtin” as common examples. Click on the image and read the story about pirates and the rhyme “Sing a Song of Sixpence/A Pocket Full of Wry”.