One of my students, a 10th grader always looked so gloomy in class and church. So I may have decided to cheer him up by grinning wildly at him everytime I saw him, until he started blushing. Then I would tease him about the slightly guilty smile he would always make. He would insist that it wasn't guilty, but I told him I knew better. But on our visit to Managaha, he and I took a picture together, and he made a REAL smile. The kind that wasn't guilty. I, of course, made a huge deal about it, which then embarrassed him some more and he started blushing again.
But here it is, my student and I with real smiles.