Our baby girl, two months old tomorrow, has learned to smile. She’s still learning to steer her eyes and focus, so you have to get yourself positioned around where she’s looking. Then the eyes widen and the whole little face lights up. Stone would melt. The process is not fully perfected: the smile occasionally veers out of control into a lopsided inebriated toothless leer, and then sometimes she’ll beam suddenly at the back of a chair or a piece of brick wall. The evolutionary behaviorists can please just butt out.
