X Tattoos

In some cultures the "X" is used as a sign representing kisses, usually to express affection or a good relationship at the end of a letter, email, or message.

This common custom dates back to the Middle Ages, when a Christian cross was drawn on documents or letters to mean sincerity, faith, and honesty. A kiss was then placed upon the cross, by the signer as a display of their sworn oath. It was also used in early Christian history as much of a display of the same.