Old Grand Daddy Amos, he belongs to the Klan,
he snores while he's lyin on his back in the can.

The story:

When I was little, some cable channel used to play this old show, which I loved. One day my dad was driving me to school and I was humming the theme song, he asked if I knew the words and I said sure, and belted them out at the top of my lungs. When I got to the Klan part, he started laughing so hard he had to pull over. He gently said, "Son, I don't think those are the right words," and busted out laughing again. He advised me not to sing it in public.