For all the times that the lines on your face
Reminded me of the days before the dragonflies escaped
Catching dragonflies for fun is a common parent-child activity. Likely “the days before the dragonflies espaced” refers to the days when his son was a small child, with the “lines on your face” representing aging, so it reminds him of when his son was younger. Jacob has become too old to catch dragonflies anymore. The end of playing this game is symbolized by the fleeing dragonflies.
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