Brown-nosing according to a six year old

This is the time of year when my students start getting spring fever and getting a little crazy. One of my students that I have a contract with didn't have a good day. On his way out, instead of looking down trodden and sad, he tried another approach. He packed his backpack and said "Teacher, you are the best teacher in the world...and the cutest." Now wasn't that nice way back when, when you could say whatever you wanted to someone else and not worry about their reaction?