How did she know?!?

So, here's a funny story about Miss Mavis. Tonight Jake and I were finishing some Christmas shopping at the mall. It was time to wrap things up for the evening and we decided to head to the Krispy Kreme Donuts shop before going home because it is on the way...and because KK donuts are to die for! Wouldn't you know, the "hot donut now" sign was on (thank you Jesus!) so we decided to take Mavis in to see the donuts roll off the conveyor belt. A Christmas miracle in and of itself:) The minute we walk in Mavis gasps and let's out an emphatic "Ooh!" Then she immediately points to the donut case and does the sign for "please" as fast as her little hands will go. Now, keep in mind that she has never tasted, seen, nor been aware that donuts even exist, much less put a hot Krispy Kreme in her mouth. She knew without any prompting that Krispy Kreme's were delicious and she needed one, pronto! It was hilarious! She was licking her chops the minute we started looking in the donut case. As soon as those donuts were in our possession she had to have one. We let her try a little, she took one bite and then shoved the entire quarter of a donut in her mouth at once. We must be doing something right, our girl knows what's good in this world:) So I ask again...how did she know?!?