OK, Sandyriver, as promised, here's the version that ol' Andy sings. By the time you're done, you'll have a pretty long mule song.
WHOA MULE

Used to have an old banjo, 'Twas all strung up with twine,
And the only song you'd hear me sing, Was I wish that gal was mine.
Well, I wish that gal was mine boys, I wish that gal was mine,
The only song you'd hear me sing, Was I wish that gal was mine.

Whoa mule, you kickin' mule, Whoa mule I say.
I ain't got time to kiss you now, My mule's runnin' away.

I took my wife to the barnyard, And I set her down to supper,
Well she got choked on a turkey leg, And stuck her nose in the butter.
Stuck her nose in the butter, Stuck her nose in the butter.
Well she got choked on a turkey leg, And stuck her nose in the butter.

Whoa mule, you kickin' mule, Whoa mule I say.
Tie a knot in that old mule's tail, Before he runs away.

Your face is like a coffee pot, Your nose is like a spout.
Your mouth is like a fireplace, With all the ashes out.
Well, with all the ashes out, boys, With all the ashes out.
Your mouth is like a fireplace with all the ashes out.

Whoa mule, you kickin' mule, Whoa mule I say.
I ain't got time to kiss you now, My mule's runnin' away.

Whoa mule, you kickin' mule, Whoa mule I say.
I ain't got time to kiss you now, My mule's runnin' away.

^^