Harry laughed, he couldn't help it. The entire situation was funny. He couldn't get the image of Malfoy storming down he hallway in a dress out of his head. It was bizarre. His laughter, however, was pure and simple amusement. He wasn't mocking the Slytherin. A sentiment, he knew, wouldn't exactly be returned had their positions been reversed. Any mockery he might have indulged in melted away under the attempt at a sneer. He was used to Draco's normal sneers and this, well this just didn't even measure up. It was hard to be intimidated by a petite blonde with big eyes and long hair, Malfoy or not.
"I think I'll be alright," he responded, remaining in his position against the door. He'd had one too many insufferable and pushy females in his life without adding another one. He couldn't even be offended by Draco's insult. His amusement overrode anything Malfoy threw at him. In the face of Draco's sneer, Harry smiled. "That look suits you better as a male. It works a hell of a lot better then too."
Finally pushing away from the door, Harry moved forward until he was standing on the opposite side of the desk from the blond. "So, you're the potions expert, how long do you figure we'll be graced with your ..." he paused her to control the burst of amusement that threatened to send him into a fit of laughter, "new look."