"It's worse if you're thinking about any girl around her," Zach pointed out - a fact he assumed was true. Some classmates had been discussing other girls before their thoughts were driven only to the teacher's physical attributes.
"Perhaps she is trying to force us not to think 'impolitely' as well as act correctly," he suggested as a theory. He had been looking into some things, but certain accusations were a bit much to voice after so little evidence. And she could still have been using it for that even if one of the theories he had followed up on was true. It was annoying that he hadn't been able to sneak past the hexes on her journal entries.
And even if his idea about thinking about girls was wrong, he certainly liked the idea of T spending less time thinking on them. And it might end up proving helpful...