First, an explanatory note: I have never been able to keep my shoes tied. Velcro only gets you so far in life, though, so eventually my mother resorted to telling me that she would have to tie cowbells to my shoestrings to alert me to loose laces. The threat got pulled out so often that, over time, it got shortened to simply "Cowbell." And let me tell you, you get some bewildered looks from people at the supermarket when your mother says "Cowbell" and you immediately drop and tie your shoe. It's a perfectly logical development of language, but at the same time, completely baffling if you weren't in on the intermediate steps.
Turns out, there was a good reason that my shoes never stayed tied. I was tying them wrong.
I still prefer not wearing shoes at all when I can get away with it, though.