"Have you ever tried blackmail? Because in my experience it works very well at Hogwarts. I mean back in my times it did happen sometimes...nothing really huge that it would be dangerous, but it happened all the same." He licked his lips when thinking about it.
"Oh yeah and then they wake up because he's dripping grease and drool onto them." He said and chuckled, making a slobbery noise to emphasize his point. "But then again...every head of house or professor in general could do it...urgh..."