He kissed it hard and smiled when she gasped. He used his teeth to scrape against the skin, then opened his mouth to suck. She let out a tiny whimper and arched her back. Keeping his mouth under her ear, one of Draco's hands snuck to her waist and gripped it so it would remain in the arched position. After he was sure he left a mark on her neck, he carefully bit the skin, causing her to moan. He stuck out his tongue to soothe the burning and she hummed the most delightful sound. He grinned.