[Rhys just grins his usual sly, salacious grin that says, almost as explicitly as his earlier lewd words, what he's thinking about.] Yes, good thing they were seventh years, wasn't it? At least they might have some idea of what I was talking about - it doesn't behoove me as an educator to confuse the children. Do you think I should go explain exactly what I meant? I'm sure I can find a board to draw a diagram on ...