Summer days. Long hours of sunshine. The higher your latitude, the longer the daylight.
A little sunshine lifts a person’s spirits. Makes it easier to be cheerful. Encourages outdoor activities of either the physical or social variety. After all, daylight after the work day increases the likelihood of certain things: An evening walk in the neighborhood – with or without dog. A casual conversation with a neighbor. Greetings between strangers at a patio restaurant.
Other summer items often bring smiles too. And some do not even involve humans – except to admire, smile, sniff, and touch.