Dog Licks Her Nose Whenever a Squeaky Toy Squeaks

A very focused Australian shepherd named Roo stared directly at her human and licked her nose whenever she heard the squeak of her favorite squeaky toy, as if the noise was a switch that activated her little pink tongue. According to her human, this trick was never taught.

This is my toy-obsessed dog, Roo. We did not teach her to do this. Every time we squeak her ball she licks her lips