Bestiality in the Bluegrass

Is it not written:

If you’re feeling quite coarse, you can bugger the horse,
Or the palfrey, the jennet, the stallion (with force),
You can bugger the donkey, the mare, or the mule,
Though to bugger the pony is needlessly cruel.

You can bugger the ermine, and all other vermine,
Like rats, mice, and roaches, if you’re not discernin’.
You can bugger the dog, it will come when you call–
But the hedgehog can never be buggered at all.