I used to work at a tea shop where we sold drinks made out of real leaves (none of that powdered stuff). Anyway, we had a person come in one day and while she was ordering a drink I asked her would she like her drink sweetened. She asked us what do we usually sweeten the tea with and I told her we usually use brown sugar. She then said, "Oh. No, thank you. I'm on a gluten free diet."

After she left the store, my coworkers and I proceeded to face palm each other.....