Opposites attract.

...

"It's beautiful isn't it?" Luna smiles over at Ginny.

"Very." Ginny replies as she positions her head on Luna's shoulder.

Luna kisses Ginny's head softly as they gaze upon the glittering stars. The night is clear and perfect.

"They remind me of your eyes." Ginny sighs.

"It's like every time I look at you I'm out here." Ginny continues with a laugh.

"Odd isn't it?" Luna asks in her flyaway tone.

"What?" Ginny asks as she sits up to look at Luna.

"That every time you look at me you see the night sky, every time I look at you I see sunshine."

For a moment Ginny is silent.

"It just means the theory is right." Ginny shrugs as she leans on Luna again.

"What theory?"

"That opposites attract."