"I see," and she kind of does? It's not a point worth pressing more, at least, because at least he knows it's not another language.

This entire conversation is just odd. Why does this keep happening?

She tilts her head at the familiar tune, but then her eyebrows raise at his admission.

"You did?" She's surprised by that, even though bats are adorable. "Huh. That might have been a little weird, but I don't think I could blame you." Because, again, bats are adorable.