The wait can be unbearable. It can be a year or a week. But however long we have to wait for the next episode of our favorite series, we can’t wait for that day to come (or year, though that can test our patience; we’re looking at you, Sherlock!). But then we have the inevitable problem: have our friends watched it yet? Why does that matter to us? Because we like sharing things that interest us with the people we care about.