This makes sense when you consider its Japanese etymology -- I mean, we don't say "sushis" when referring to multiple California rolls. But then again, as the Observer notes in its 2014 article, the AP Stylebook "took a firm stand and opted for emojis" as the proper plural, a position that was echoed by the American Copy Editors Society board member that was asked as well.
So, who knows, really. Perhaps the greatest mystery of our generation will go unsolved. Here's an idea though: let's all just go back to calling them emoticons. Those are easy.
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Joe McGauley is a senior writer for Thrillist and has too many favorite emoji to pick just one.