You have to admit, it is a very reliable indicator. Perhaps not the best one altogether, but at least a reliable one.

[She squeaks a little, though, when he gets up and takes her along with him, equal parts startled and pleased. It's familiar enough that it's easy to wrap herself around him to make the carrying easier, with her arms adjusted neatly around his shoulders and her knees held together so that he can hook efficiently beneath them.]

You're playful, that's another good one, too.