Damon fed for the pure pleasure of feeding, and to sate his curiosity about whether Elena would taste as good as he thought she would. He wasn't actually hungry, and that made it easier to stem the flow with his tongue, and pull away. He pricked his finger with the tip of his fang, letting a few drops of blood well up.
"Open," he said, placing the finger at Elena's lips. She still seemed to be floating on her orgasmic high, and he wondered whether she would even comprehend what he was offering.