How 'X' became the universal symbol for a kiss — mashable.com

You've certainly seen it at least once today, if not actually used it yourself. The "X" as a universal symbol for a kiss is firmly rooted in our lexicon. It's become so familiar that we barely think about it, but how did this letter become shorthand for a sign of affection? We take a look at why X's equal kisses, and ponder whether they still will in the future. The Oxford English Dictionary's definition of the modern alphabet's 24th letter says the X can be "used to represent a kiss, esp. in the subscription to a letter." But it's not just letters or notes anymore. We sign off our text messages, emails and even comments on social sites with X's.

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