"Aang...?"
"Hnh... What...?"
"Can I ask you something?"
"'Course. Anything. What's on your mind?"
"Well... I was just wondering... Are all the Avatars as good in... this... as you are?"
"Huh, what makes you think Avatars had some kind of an advantage in this area?"
"Well I've heard you bunch are really popular among the ladies... Or guys, in case of female Avatars. How's that?"
"Oh, it's not because of that. They like us because of fame, power, things like that. Y'know?"
"Uh-huh. So you're saying you guys're not actually any better in bed?"
"Well, actually..."
"What? You really are better than the rest?"
A short silence. "...This isn't actually any common information... But sex and physical intimacy is, well, the only other place, apart from the Avatar, where all five can exist in a perfect harmony."
Silence.
"You're kidding me."
"I'm so not! Like, it all starts with Air, where you start by asking around, taking things easy, checking out what two people would like to do together."
"Like 'How about we had some fun, eh baby?'?"
"Well you don't need to talk, necessarily. You just do stuff and see what the other one likes. If she doesn't, you stop. You miss the Air part, and it's rape. Pure and simple."
"Okay..."
"Then, assuming that it's gone to the point where both people would like to go all the way through, comes Water. That's when you forget about thinking, and just do whatever feels nice. Get to know her through and through - or if you know her already, to remind yourself."
"Touchy feely."
"Exactly. Foreplay is important. Without water, it's just an emotionless, mechanical procedure that'll be forgotten right afterwards. Oh and, speaking of water..."
"Uh-huh?"
"This is pretty much the best place in the world for your bloodbending." Laughter. "Used in moderation, of course. Too much of that and it's rape again."
"Wouldn't want that."
"'Course you wouldn't. Anyway, let's move on: Next there's Fire, which is about command. This is when it all gets really hot, and when it's determined which side calls the shots and which one gets to enjoy the ride."
"But even the passenger gets to throw a few punches over there in the middle, right?"
"Yes, because if she, or he, didn't, then it'd be just like a king taking all the power for himself and isolating himself from his kingdom. He'll just keep ruling as a dictator, forgetting what it's really about, which always results in a disaster. Some power for peasants and commoners is good for both sides."
"That's... not a very romantic metaphor."
"But it's true."
"Huh... So anyway, now it's Earth, right?"
"Yep. And that's when you, bet you didn't see this coming, forget all the talking and touching and thinking, and bring in the brute force."
"Rock-like!" More laughter. "Yeah, I think I see what you mean. So where does Aether belong in all of this? You mentioned five elements, didn't you, not just four."
"Well, aether is all about life. Most people think it's fire, but fire is really about free will and independence. Aether comes before that."
"Yeah... This whole thing, isn't it like, all about creating new life."
"Yes." A short silence. "Well, it used to be like that, anyway. It's like the lion turtle said: At first, there was only aether. That's the time when people didn't know all about the feelings, and only cared about continuing their existence."
"And these days aether is almost forgotten: And so people mostly do this just as an expression of love, and because it's fun."
"You said it. The world barely remembers about the real reason for this thing: It's just one giant orgy for them now. We could use a bit of aether around, couldn't we?"
... Silence.
"Aang... Did you just... suggest what I think you did?"
"Well don't you think it'd be a good idea?"
"Well..."
--
A/C: I was going to make it a twist ending where it would've turned out he wasn't talking to Katara after all, but instead giving someone else, like Zuko, sex advice or something. But then it wouldn't have been bed talk, and that's pretty much the core of this entire fic.