Excerpt from this article:
On an internet occupied by as many finger-wagging “grammar Nazis” as slovenly texters who prefer emoji to verbal displays of emotion, the Oxford comma has become a cause célèbre. This is especially true on dating apps, where many users have deemed the punctuation mark something they “can’t live without”—a designation that’s put it in the same lofty category as cheese, the beach, and Game of Thrones.
Also known as the serial comma, the Oxford comma is the one that goes before “and” (or “or”) in a list of three or more things: “The American flag is red, white, and blue.” Fans of the Oxford comma think it prevents ambiguity.
Recently, the Oxford comma has found a spot on the Bingo card of online-dating profiles, alongside mainstays like “no hookups,” “no drama,” and “420 friendly.” Whether you’re mindlessly grazing on Tinder or Bumble, OkCupid or Match.com, you’re now as likely to learn someone’s thoughts on the Oxford comma as you are their job title or their penchant for tacos. On the Tinder subreddit, which has 1.8 million subscribers, one user lamented that the Oxford comma features in “like a quarter of bios ’round my parts.” Another said, “It’s everywhere.”