A woman crosses at the lights with her stroller, crests the footpath and engages two similar women with similar strollers. All three adopt matching grins of many teeth, and crinkly-cheeked gazes of sunshine and joy, accompanied by an array of high-pitched sounds that no one could possibly disentangle. The waiting two hone in on the just-arrived stroller, directing their eyes, teeth and noise in that direction.
Appalled, but aware of its obligations, the baby grins back at them.