I found and grabbed this image from a much-shared post on Facebook many months ago.
It is a trivia from Ripley’s Believe It or Not.
It gives a historical origin on why the letter “X,” particularly when used in documents or correspondences, is taken to mean “kiss.”
I didn’t know that.
I do know that X means kiss, but didn’t know when, where, or how it started.
What I am aware of is that most young people actually know that X means “kiss” from “XOXO” which means hugs and kisses, where X = kiss and O = hug.
X in this case, however, has a more contemporary etymology. X and O from a bird’s eye view look like 2 people kissing and hugging, respectively, in the pop culture of emoticons.
If you come to think of it, this trivial fact casts an entirely different light on XXX, don’t you think so?