Oh my golly wiz, where do I put my keys when I'm already holding 1 purse*, 4 bags of groceries, 2 little hands, my phone, and the change that I was too rushed to put in any number of pockets/bags/wallets? Oh thank heavens. My wrist. I put them around my wrist (which is somehow the only part of my body not already in use). 

*If you have a Ma & Pembum bag, chances are this is not a problem since you have a CROSSBODY STRAP. Let's not complicate the already giant collection of hats you wear on a daily basis.