Why 'XOXO' Means 'Hugs and Kisses'

If you want to try something fun this Valentine’s Day, type “XOXO” into a Facebook comment. It’s shorthand for “hugs and kisses,” and the text becomes highlighted, and if you click on it, little animated hearts float up on the screen.

But how did “XOXO” come to mean “hugs and kisses”?

Well, the truth is that nobody is absolutely sure. 

Let’s talk about the X first.

Why is an X a kiss?

The earliest citation for X as a kiss in the Oxford English Dictionary is from 1763, and the highly quotable Winston Churchill used it in 1894, but he also felt the need to define it. He signed a letter

(Many kisses.) xxx

One theory is that if you use your imagination, an X looks like two people kissing, like a mouth on the left (>) meeting a mouth on the right (<) to create the complete X.

There’s also a religious theory. The letter X has been a symbol for Christ since the time of the Greeks because it’s the first letter of the Greek word for Christ, “Christos.” (ΧΡΙΣΤΟΣ) 

And as I wrote about a few years ago, that’s why you shouldn’t get upset about people writing “Xmas” for “Christmas.”

As the book “Kiss and Tell” says, “In the days of early Christianity,  when most humans didn’t know how to write, people would sign important documents … with an X instead of a signature. The X pulled double duty, symbolizing Christ’s cross, as well as his name … The signer would then kiss the document as an oath of sincerity.” So the theory is that through this act, kissing an X, the X became associated with kissing. 

I find that theory less convincing since, at least according to the OED, it seems like using the X to symbolize a kiss is a lot more recent than early Christian times, but it’s still an interesting bit of history.

Why is an O a hug?

Using an O to symbolize a hug is much newer, at least according to the OED, which shows the first use in 1948. The O also seems to be used to symbolize a hug only in combination with an X—never alone.

The theories about why an O symbolizes a hug seem even more made up than those for the X.

People say that maybe it looks like arms circling something in a hug. Or that Jewish immigrants used the O to sign documents much like Christians used the X. 

I’ve never seen anyone else talk about this idea, but I wonder if it comes from tic-tac-toe. That game uses X’s and O’s, so the two symbols go together in many people’s minds. If an...

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