Katara: Okay, we have got to explain this thing to Zuko to save his relationship. And you laughed at me when I went to that weekend-long math conference.
Toph: 'Cause you called it "funky mongoose-cats and their feisty stats."
Katara: That was the name! It was so cool.
Toph: It was not. Anyway, it's not about the math. They haven't seen each other because of the night shift. They just need to bone.
Katara: What? Gross! Toph, those are my brothers!
Zuko: Is everything okay, Katara?
Katara: No, I lost my necklace.
Zuko: Did you see where it went?
Katara: Actually... it's behind one of these three doors. Why don't you pick one?
Zuko: Are you trying to use probability to trick me? It's unbelievable. I don't need math ruining my friendships when it has already ruined my relationship.
Toph: Come on, Sparky, the math thing isn't the problem. Night watch is keeping you and Sokka apart. You two just need to bone.
Katara: Don't say it again.
Toph: I said you two need to bone.
Zuko: How... dare you, Toph Beifong. I am the Fire Lord!
Zuko: [five minutes later, shouting] Bone!
Zuko: [ten minutes later, sternly] What happens in my bedroom, Toph, is none of your business.
Zuko: [twenty-one minutes later, shouting] Bone?!
Zuko: [fourty minutes later, calmly] Don't ever speak to me like that again.
Katara: Why did you do that?
Toph: Dude was pent up. Now he knows. Problem solved.
Katara: Zuko, I know you don't wanna talk about math but I did contact a math professor...
Zuko: No need Katara, it's all good.
Katara: So the fight with Sokka is over?
Katara: Because you understand the math now?
Toph: Because you guys...
Toph: Knew it! See what happened is your brothers had sex.