Imagine you invited me over to your home for dinner, and you offered me a glass of tap water. And I said, "No thank you, I don't drink tap water." Would you ha

Imagine you invited me over to your home for dinner, and you offered me a glass of tap water. And I said, "No thank you, I don't drink tap water." Would you have any questions for me? Would you feel strange about drinking the tap water yourself now? Would you wonder why I chose to say "I don't drink tap water" instead of just "No thank you"?