The second button that once carried a message from the heart may no longer make it to graduation events, as Japanese schools shift to blazers and students focus on social media-friendly memories.The origins of the tradition -- giving the second button of a stand-up collar jacket to someone special -- remain unclear.Kanko Gakuseifuku, a major school uniform retailer in the western Japan city of Okayama, says one theory traces it to soldiers giving away the second button of their military uniform before leaving for war.Another sees it as a symbol of "winning the other person's heart," with th…READ FULL ARTICLE