First things first: no googling, binging, yahooing, or using any other form of searching. No asking other people. No consulting dictionaries or thesauri. You may do absolutely no research at all. Now, as for the challenge. I, like many English speakers, have heard the phrase "warmed the cockles of my heart" more times than I care to try and count. What I've never heard is an accurate explanation of what the actual fuck a "cockle" really is. I've heard of cockleburs and I think a cockle is like a clam or something, but that answer simply does not suffice. I want to hear what you, Iwaku, have always thought about the word "cockle". Your challenge is to explain in your own words what the "cockles" of the heart actually are. You may be as serious or as humorous or as crazy as you'd like, but please, do not look up the real answer until after you've posted your piece. If you wish to make corrections and include what you've discovered "cockle" to mean, please hide it in a spoiler tag so that the glorious mystery won't be ruined for others until after they've written their piece. Thank you and have fun!