D: Oh! look at this. A: Dちゃん, do you have to pick up everything that's in a box marked "Free"? D: No. A: ... D: But I have to look. A: What is that? D: Animal Societies. A book about... insects. And primates. A: Do you need that? D: No, but I like it. A: Look, look! That's a library book. That person didn't even want it after taking it from the library! D: No. Look here. "Withdrawn." Oh! Look at how old it is with this old stamp kind of checkout thing. Heh. Wait.... 1968. A: The library didn't even want that book! D: [thumbing through Animal Societies] A: But you do? D: Yes.