"Zuko? Will you teach me how to kiss?" Zuko looked up at Aang, startled. The younger boy was fidgeting nervously.
"Why?"
"Because maybe if I know how to kiss Katara will like me." Zuko sighed. If that bitch was so shallow she wouldn't like someone as wonderful as Aang just because he didn't know how to kiss, than she didn't deserve him.
"I will not teach you how to kiss just so you can impress Katara." Aang's face fell. "Besides, the best way to learn is experience and practice."
"Oh." Aang sat down dejectedly, looking miserable.
"Oh, all right. I'll teach you how to kiss." Aang brightened.
"Really? But you said-" Zuko pressed his lips against Aang's to shut him up.
"I know what I said. I changed my mind." They were in an isolated part of the Air Temple, so it was unlikely they would be disturbed here. Zuko made sure the door was firmly shut before sitting back down beside Aang. Now he just had to decide how to start. "We'll start with chaste kisses." Aang nodded. Zuko cupped Aang's chin in his hand and pressed his lips against Aang's gently. "All right. Now you do it." Aang repeated his actions, giving him a brief peck. "Try it again. Kiss me a little longer this time." Aang kissed him again. "Much better.
"Now let's move on to slightly deeper kisses." Another nod. Zuko kissed Aang again, parting his lips gently with his own before pulling back. "Now do what I did." Aang shyly repeated Zuko's actions, lingering briefly before pulling back.
"How was that?"
"Perfect."
"What are you going to teach me next, Sifu Hotman?" Aang looked at him, eyes wide, cheeks slightly flushed, lips slightly parted. Zuko had been intending on gradually deepening their kisses little by little, but looking at Aang, all thoughts of that flew out of his head. He cupped Aang's face in his hands, covering the technically younger boy's mouth with his own. He flicked the seam of Aang's lips with his tongue, parting them and thrust his tongue inside, pulling him closer as he explored the inside of his mouth. Zuko flattened Aang against him, pressing them close together, as he stroked his tongue over Aang's, twining them together, reveling in his eager response. They finally parted, gasping for air. Grey eyes hazy with desire, Aang cupped Zuko's face in his hands and repeated his actions. As he slid his fingers into Zuko's hair, then slid them slowly down his spine, Zuko felt an unmistakable bulge pressing against his stomach. Good. Aang was just as turned on as he was. He tightened his grip on Aang's waist, pulling him even closer.
Aang rested his forehead against Zuko's when he finally pulled back, both boys breathing hard. Zuko kissed his cheek. "How am I doing so far?" Aang smiled crookedly.
"Even better than you do teaching me Firebending." Aang met him halfway when he moved for another kiss, all semblances at their actions being part of a lesson completely forgotten. Their kisses deepened as their hands roamed restlessly, removing whatever clothing got in the way of their explorations. Katara's screech broke them apart.
"Aang! What the hell do you think you're doing?"