"Oh, that's perfectly fair. It's the 'join me' part that really matter, not the 'walk' bit. Now, where to go to find oneself?"

The buterfly pipes up. "The caves are probably a bad idea. You'd just get the rest of yourself lost."

Theodor either isn't hearing the butterfly, or he's deliberately contradicting it. "What about the caves? Why, if we're both missing something, we could try to get lost, then we might end up in the same place as what we've already misplaced!"