To wear one's heart on one's sleeve

Posted by Word Camel January 14, 2002In reply to To wear one's heart on one's sleeve posted by Marian on January 14, 2002

I believe I understand the meaning of this phrase (to show one's emotions openly, particularly longing or adoration for another person) but I wonder about its origin.

Surely this refers to the chivalric custom of wearing wearing the kerchief or garter of one's chosen lady on one's sleeve?