He made some vague noise in reply to that. He also doubted that color was the only difference, but he didn't feel like getting into the details of exactly how these things she was talking about worked.

But whether fortunately or unfortunately for her, he could tell there was something she was holding back from saying. Something like that felt different from the kind of desire that could create a Yummy, but it was a desire nonetheless. Curiosity. He didn't mind humoring it for now. "What aren't you asking?"