I would like to add my agreement with 'Nutty' and add the information that the poem was originally written to celebrate a weekend of unaccompanied singing in a barn on a farm in Northamptonshire at the end of October every year more commonly known as Whittlebury - hence the line 'shaking plaster from the walls' line(sic). The weekend is attended by both Women and Men and all tasks (from cooking to cleaning the loos) are shared out in a very PC fashion.
And as for Scowey (Keith Scowcroft in full) not being PC, well that may be so (after all, he is from Lancashire and they do tend be unreconstructed up that way) but a kinder, friendlier, gentle, man who'd give you his last chip you couldn't hope to meet.
The poem was written only a few years ago and accepted immediately by those for whom it penned without any qualms or hesitations. So sing the song for goodness sake and enjoy it and don't try to change it (especially not in the UK or you'll get laughed out of the room) the word are special to a lot of people.
Keep Singing; TON