Coincidence or real tip?

Yaya is not a "breakfast" person. Usually she eats very limited amount in the morning and hardly drinks. Even though not worrying too much of it, I am still glad to see her eating something like this morning. She finished all the pancakes on her plate and asked me if she can go out to find dad and Peter (Peter likes to go outside to play a little before going to school). I asked about the milk, and her reply was "I am not thirsty". Instead of pushing her to drink, I said "OK". She then told me "I will drink a little". In fact, she drank it all. Sometimes, I do feel if you want a kid to move forward, you will be better off if you say "you can move back" than "please move forward".