So, does water have sugar? In its pure form? Absolutely not. In the real world? Eh, maybe a ghost of it. But you have to work hard to find it. Like hunting for a unicorn in a desert.
Next time someone asks, just smile. Tell them: “Water is the one thing in the grocery store not trying to give you a cavity.” Then drink a glass. Slowly. And enjoy the fact that you’re consuming nothing but truth and hydrogen bonds.
Go on. Be the water nerd you were born to be.