They said their good-byes, and Denny pressed the button with his pinkie. He crouched down and held out his sticky hands for me, and I obligingly licked them clean. “Sometimes I believe,” he said to me as I indulged in the sweetness of his hands, of his fingers, of his opposable thumbs. “Sometimes I really do believe.”
Enzo gets to overhear all that's going on; that's the physical level of what's going on. And we get to hear the conversation too. That makes the mechanics of the scene work. But then what does Denny do, in his joy? He allows Enzo to lick the cookie batter off of his hands. Denny's hands. The things that Enzo wants most in the world--DENNY'S HANDS! Figuratively, Enzo is INGESTING Denny's hands. Symbolically, we know now, as we read the book, that Enzo WILL achieve his goal of being reincarnated as a person. Done. Case closed. Your conscious mind might not know it yet, but your subconscious already knows...
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