Valentine's Day is a day of love and sweet treats, including conversation hearts with cute messages like "Call Me" and "XOXO." Originally created by Necco in the 1800s, these heart-shaped candies have become a Valentine's Day staple. After Necco went bankrupt in 2018, Spangler Candy Company acquired the rights to produce conversation hearts. While classic messages like "Love U" and "Be Mine" remain popular, some older sayings like "Fax Me" have been retired.
Source: https://tasteofcountry.com/23-country-conversation-hearts-for-valentines-day/