Teloch commented: Now what about other fetishes? Did they experiment with toys or cosplay? What was their sex life like when Azula was pregnant?
On top of Zuko liking her tits, her ass, her feet, and her hair, he also has a thing for seeing Azula in specific clothing, like her uniform from when she was still going to the Fire Nation Royal Academy For Girls, the Dai Li inspired clothes she wore in Ba Sing Se, and some of the more fancy dresses she wears on special/important occasions, because he likes seeing her all dressed up. However, his absolute favorite has to be seeing her wearing all kinds of sexy lingerie, and also seeing her in simple clothing when she's playing a more submissive role. And as much as he enjoys it when she wears any of these, his favorite thing is ripping them off her body. Since they have more than enough money to buy replacements, Azula enjoys it as well instead of being mad at him. She likes leaving lip-stick stains on him, and he likes seeing her without make-up.
I think they're both "aggressive switches". They're constantly fighting for dominance, but they can also be perfect submissives when they feel like it. Azula likes doing it anywhere they could get caught and in "inappropriate places" (like crypts or their parent's bed). They both get off on the "taboo" aspect of their relationship, and they get all hot and bothered when the other calls them "Big brother/little sister" in just the right tone.
While the "vanilla" sex is already great for them, they both like to spice things up. Chokers, plugs, whips, belts, canes, masks, blind-folds, clamps, ropes and all kinds restraints... they'll try everything at least once. Zuko would be more gentle with her during pregnancy - and get off of fucking his little sister as she's carrying their baby.
They definitively like roleplay. Pretending to be strangers, acting as their younger selves, prison guard and inmate, teacher and student, princess and slave, Fire Lord and concubine/whore, pirate and hostage, sage/messiah and "devoted" believer, twins... and even as their own parents sometimes.