[ Did you Know ] - Valentine Expression : Wearing Your Heart on Your Sleeve?

This expression comes from  early 1800's where young American and British men wore slips of paper pinned to their sleeves  with their girlfriend's name written on.  They did this for several days (why and when I have no clue) and so it started the expression "wearing one's heart on one's sleeve."

Today the American Heart Association in the US has a "Save a Sweet Heart" anti-smoking campaign during Valentine's Week to help educate school kids against smoking.