Can't get Snuffy's link on 06.02.13 to work, so here is the song he referred to, by Watt Nicoll: a couple of my friends sing it and have added a chorus. You can hear it as peaing or peeing - pick your own!

Peaing in the Green Fields of Dundee

There's a factory on the outskirts of Dundee
Round it grow the fields of Smedley's peas
After school they set me free
Every year when I was wee
To pea in the green fields of Dundee

Ah the highlight of school life was for me
The six weeks every year they let us pea
But they fairly drove us daft
Before they let us aff
Teaching us to pea in the green fields of Dundee

Now you might think that anyone can pea
Wonder what the joy of it could be
We had contests of the best
Man you had to pass a test
To pea in the green fields of Dundee

'Twas at the pea-ing that the girls first caught my e'e
I noticed they pea-ed different frae me
Being five foot six or so
I pea-ed high whilst they pea-ed low
As we pea-ed in the green fields of Dundee

Ah my heart soon was lost to Polly the Pea
The finest little pea-er in Dundee
We braved all kinds of weather
That we might be together
To pea in the green fields of Dundee

I found happiness in many different ways
But aye my mind returns to childhood days
Won't the kids all think me soft
Would they just stand there and laugh
If I went back to one last pea in the green fields of Dundee.