So,indeed cumulative song. Must have taken some stamina (or scrumpy) to have sung from 12 down to 2 and then back up again. Didn't occur to me it could be a parody on 12 Days of Xmas though I would be inclined to think not. I must say I much prefer JOH's words to 12 Days, especially the four-footed pig and three-thistle cock, whatever that was. Any ideas? Five for a fifth and a fairy is quite nice too, if rather gnomic.