Who the hell was this bloke and why was he wandering around Hogwarts all skeezy-like? Selwyn turned, gave the would-be professor a shifty look and went back to his charming work.
Unfortunately, the skeezer just wouldn't quit. He immediately began with exclamations of joy about learning how to cast a patronus. Selwyn rolled his eyes, while keeping them on his work so the dude wouldn't see just how pathetic he was. Didn't he know anything? Like, for example, that this castle had been invaded by Death Eaters at least five times in the last three years and almost everyone who wasn't a first year could already cast a fully formed patronus?
Work done, Selwyn spun around, ready to face his... new fan? Wow, he hadn't had one of those since fifth year. Maybe it was time to get some new blood in.
"Well, you know, Jamie's so busy, she probably hasn't had time for something so trivial as that announcement," he replied easily.
Seeing the skeezer's face, he realised it wasn't what he thought - some decrepit professor trying to act up to date and fashionable. It was actually someone relatively young. Why oh, why did Hogwarts keep hiring young idiots? Odds were this dude had only walked past the Defence Classroom so he could "coincidentally" run into Jamie in the first place. Double skeezer.