wdyat12,
I remember "How Long" from my Grandfather:
G: "How Long is a Chinaman."
Me: "I don't know, Grampa. How Long is a Chinaman?"
G: "That's right!"
Me: "What is?"
G: "How Long is a Chinaman!"
Me: "I still don't know..."
G: "That's why I'm telling you: 'How Long is a Chinaman!'"
Me: (uncertainly) "Oh. Umm, thank you."
G: (with a small smile and a wink) "You're a Welshman!"