Author's Notes: Written for OCDdegrassi's Dirty Harry Potter Pick-Up Lines Competition.
Post DH. I'm going with the idea that students who missed a majority of a year at Hogwarts during the war (including Luna and Draco) were allowed to retake the year.
Draco caught up with Luna on her way to class. He took her hand, pulling her into an empty classroom, and pressed her gently against the wall, his lips hovering just next to her ear. "All right, Luna?"
"Oh, hello Draco. Yes, I'm quite well," she said mildly. "Though I need to get to Charms class…"
"Charms class can wait," he told her. "Wouldn't you rather spend an hour in here with me?"
Luna considered, looking up at the ceiling and frowning a little bit as she thought about it. Draco sighed slightly, and leaned against the wall to wait while she made her descision
"Yes," she said at last, and Draco sighed, then kissed her again, pressing her slightly against the wall. He traced his hand along the edge of Luna's cheek.
"You know something, Luna?" he asked, his tone light and teasing while his hands travelled slowly down to her waist.
"I… I'm like the horn of a Crumple-Horned Snorkack," he told her.
Luna pulled back and looked at him, confused.
"In what way?"
A slight, rakish smirk formed on his face. "I'm explosive…"
There was a beat of incredibly awkward silence, while Luna stared at Draco and he felt increasingly nervous. At last, Luna cleared her throat. "Well, that's lovely, Draco… at least, I think it is… but… the horn of Crumple-Horned Snorkack isn't explosive…"
Draco looked taken aback. "It's not? But… there was that explosion in your house… you told me about it!"
"Yes," Luna nodded, "but it turned out that that wasn't a Crumple-Horned Snorkack horn after all. It was actually an Erumpent horn, and those are explosive, but Crumple-Horned Snorkack horns aren't."
Draco swore softly under his breath and rubbed his forehead. That's what I get for trying to be clever.
"Besides," Luna continued, "why would you want to explode?"
"It's um… it's a…" Draco struggled for words. "I meant… in a, um… in the sense of…"
Luna waited, head tilted to the side, while he tried to work out what to say.
Finally, he gave up.
"Let's snog," he said.
"All right," Luna said brightly. Draco knotted his hand in her long hair and kissed her, and tried his very best to put thoughts of the non-explosive nature of Crumple-Horned Snorkack horns out of his head.