The Evolution of Mmm

Lately Jackson is obsessed with 'solid' food and is getting pretty tired of baby food. In an attempt to get him to eat the baby food left in the cabinet I would say "mmm" after each bite. From that he started saying "mmm" every time he would take a bite and now I can say "Jackson do you want to get something to eat?" and he will respond with "mmmm" It's so cute. The only problem is now when he puts something in his mouth that he isn't supposed to or that I tell him to spit out, he looks at me and says "mmm". Crazy kid.