Moonspear tooth-hurty

"Okay," Osiris agreed in acknowledgment of Lyra's direction; his worries had mostly vanished, given the reassurance she had offered. 

With a course of action decided upon, they set off in the direction of the river in a light jog. Keeping to Lyra's side, Osiris remained silent until a thought suddenly crossed his mind. "I'm going to lose all my teeth, right, Aunt Lyra?" he asked, fascinated with what he had just experienced. "Why does that happen?"