We get few of these friends in our lifetimes, the ones to whom we don’t need to explain our pasts. The ones with whom we’ve shared our childhood learnings. The ones with whom we’ve made youthful mischief and teenage mistakes. The ones, like this girlfriend yesterday, who remind us that we’re not so different, decades later, than we were back in the day. And by in the day, I mean 7 or 10–1/2 or 16.