Caroline was making her sandwich for lunch while I cut cantaloupe. We were chatting about something, and she answered in that singsong-y tone that basically is the same thing as saying, "Well, duh. You're totally annoying me."
I immediately told her it was not appropriate to speak like that, and she sincerely asked why. I told her that the tone was hurtful, and that we don't speak to one another like that in our family or with our friends.
Her thoughts were, "Hm. But teenagers talk like that."
I said, "Yeah, they often do, but teenagers sometimes push limits like that because they're kind of figuring out how to be grownups. They don't always have other people's feelings in mind because they have a lot going on in their brains."
She said, and I quote, "Oh. Well, you can believe me on this one, Mama. I'm going to be the nicest teenager in the history of the world."