Draco hated that Dennis was smiling at him because it made him want to smile, too. And that was just unacceptable.
Automatically Draco took a breath, but of course it wasn't going to smell here, yet. There was nothing here to make a smell. But then of course he remembered the way the one in Diagon Alley had smelt, how first thing in the morning it would hit him and take an hour or so to get used to. How it reminded him of the dungeons at Hogwarts, the smell that lingered permanently in the potions classrooms. "Thank you," he said without thinking. It was a helpful tip, after all, but Draco rarely showed gratitude so openly.
His eyes darted quickly to Dennis and then away again when he mentioned his ex-boyfriend. Then back again to look at his hair. Then away.
Draco drummed his fingers on the counter, then moved away, taking a few steps towards Dennis. "Interview with a Vampire?" he asked. "Wasn't that a Lockhart book? I don't think you should put much heed in anything you've read of his," he said, stopping a foot or two from Dennis. "If I was that would be one of my many, many secrets. Maybe you could write my biography one day."
Was he flirting? Playing at flirting? Assuming that his open heterosexuality would stop any other questions.