This is one of the MOST thoroughly 'processed' songs in folkdom! People hear it, forget the exact words, but remember the general concept,,,,and re-write it with locale changes, chorus changes, etc...they expurgate it for mixed audiences, they spice it up for late night, they make it fit 'their' culture..and this has been going on for several hundred years!

It's a riot to start this in a group where several people know different version, and watch the steam rise as folks say to themselves.."THAT'S not how it goes!"...*grin*