Ten summers ago, this space decided to kick off the season by digging into the vault of popular songs devoted to the unrepentant joys and indulgences of summer. Fun season, fun music, fun blog post. Three songs had made that cut, with multiple readers sending in suggestions/lamentations about others that they thought should have. So when summer rolled around again a year later, it seemed right and proper and, well, traditional, to offer up a second volume. So here we are, 10 years in, the field of potential songs grown a bit thinner, most of the low-hanging fruit almost picked clean…