See last chapter.
Uncle Iroh was doing it again. He was trying to give Prince Zuko, "The Talk." But Prince Zuko couldn't help but walk away.
"You don't have to hide your feelings," cried out Uncle Iroh.
Prince Zuko said nothing, but stalked off, with heavy footsteps.
'In due time,' thought Uncle Iroh.
"Uncle! I don't like that water tribe peasant" called off Prince Zuko. And once again Uncle Iroh laughed, because he knew the truth.