Are X or O kisses?

XOX, or XOXO, means hugs and kisses, with the x representing kisses and the o representing hugs. It’s usually used as a lighthearted way of expressing affection, sincerity, or deep friendship.

Why does X mean kiss?

Origins. The common custom of placing “X” on envelopes, notes and at the bottom of letters to mean kisses 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.