It was a very good question. After what Ginny had told her about touching breasts, Luna assumed the same applied to secret holes. Her friend had told her it was okay to do sex things in front of those you trust, not to do sex things to those you trust.
"I suppose not," she finally answered. "My chest does hurt. I hope it goes away once we are out of the water."
Holding on tight, the small Ravenclaw got a free ride to the shallows of the pond. Standing up, she wiped away and gunk that had gotten on her. In the meantime, Ginny had gone and laid down. It made Luna smile, and she skipped over to the rug to join her. Laying down beside Ginny in the opposite direction, she stared up at the blue sky.