The deceptively frivolous smile doesn't falter; she'd laugh if she knew what he was thinking. Of course candy was bad for you — childish self-indulgence was half the fun of eating it. With their world threatened by monsters from beyond the distant stars, it was good to have a taste of something sweet to remind yourself that there was more to life than blood and bitterness and fear.

Or maybe she's the only one that needs that sort of thing. She wouldn't be surprised.

"You should try smiling next time! I bet it won't kill you."

Two fingers are applied to her cheeks, at the corners of her mouth, pushing up to exaggerate her smile. He's clearly meant to imitate the expression.