Smiles – smiles on photos, at least – were a twentieth century invention: smiles on the faces of the subjects of Victorian photographic portraits are as rare as Trumpian truths. The reason was partly that Victorian cameras could only cope with fixed expressions – but it was also partly that they tended to be a miserable lot. By the 1920s and 1930s, people were more relaxed, and smiles began to appear, and this added a welcome layer of humanity to photographs. Once you achieved the technological ability to instantly see – and digitally enhance – your photographic image, things started to become unreal again, with blemishes banished and pouts propelled to prominence. For a few decades, however, photographic smiles reflected something like real joy and honest emotion. It was the age of the smile.