Ohhh okay. So five isn't old enough. Maybe when Yotsuba is six everything will make more sense!

[Looking around for a short moment, and then taking a quick glance at the mistletoe... Pfft, like age has ever stopped her before. She has the gist of this.]

Hey Buffy, Buffy! Yotsuba needs to tell you a secret! [Motioning for Buffy to come closer.] Need to whisper in your ear!