Sometimes when Erin really likes what she is eating she’ll crack a big smile then jut her chin forward and let out an "mmmMMMMM".
But how am I supposed to tell the difference between those sincere exclamations and what I’m certain are the formalities she’s learned: even with a disgusted, scrunched up face, or lemon sour-puss, she’ll still give us "mmmMMMMM".
Is it possible she has already learned how to humour us?