Aha! Now I know where the Smothers Brothers got their song:

My old man's a fireman, now what d'you think about that?
He wears a fireman's suit, he wears a fireman's hat
He wears a fireman's raincoat, he wears fireman's shoes
And every Sunday morning, he reads the Fireman's News
And someday, if I can
I'm gonna be a fireman, just like my old man

Then they go through several more occupations, ending up with "My old man's a cotton-pickin' finger-licking' chicken plucker" who, after all the tongue twisting, "reads the New York Post." Isn't the folk process wonderful!