Harry studied Ron, chewing his lower lip in thought. "Maybe you should go to St. Mungos," he said, glancing down at Ron's arm. "We...we never did find out exactly what those brains did. They...they could be the cause." He smiled at Ron. "And I know you're not a fraud." How could he, when Ron had perfectly read what he was thinking.
"How long as this been going on, anyway?" he asked, studying Ron for any signs of pain. Luckily, today there didn't seem to be any. Just a love bite on his neck, which Harry very carefully did not look at. "I thought the other night was the first time?" If it wasn't, and this had been going on longer, then they definitely needed to find someone to help Ron. He never wanted to see Ron in such pain again.