Valentine's Day edition: what's the origin story of XOXO?

Do the X and the O really mean hugs and kisses?

The X has been used to mark kisses for quite some time, but did you have any idea that there was a religious backstory to the use of Os to mark hugs? The evolution and the use of the X and the O to communicate faith, identification, and love (as well as so much more) traces as far back as ancient Egypt.