I sometimes wonder what babies are thinking. Sometimes they just look so unhappy and I wonder if they are really unhappy or if I just have unrealistic expectations that babies should smile all the time. I mean, look at newborns. They should be the happiest people in the world. Everyone smiles at them and tells them how beautiful/handsome they are, and they do nothing but just stare back. Maybe they're staring at you because they know that they're not as cute as they will be once they're about 6-months old and they're trying to figure out what it is that you see in them. Or maybe they just think we're weird. Or maybe they just haven't developed enough cognitive skills to smile.
(For the record, I don't know this child)