Slughorn saw the flicker of the grin before Julius suppressed it, and completely misinterpreted it. "I mean what I say, Julius, I know you'll make me very proud of you and all your achievements." He told him, "Very proud. And I've never been wrong about a student yet."
His hand shifted higher, fingers still stroking although the movement was different now, more concentrated on the boy's flesh, teasing over him. "How friendly? Well, Julius, despite what they say an ambitious boy can never be too friendly."