"I never knew what I looked like as a baby. Aren't I adorable?" It's displacement activity, to be honest. There's bits of Aang's past that were sad and painful, and a future file that looks very tempting to click on it, especially after meeting Korra and talking to her. Playing around with the 4-D image of himself is far safer.

Depending on how well Lust knew Aang, she might be able to get... well, that he's not being as frivolous as he seems.

"Did they have these kinds of machines where you're from?"