Warning! Shoe and/or Foot Anomaly, Dead Ahead!

Right shoe/foot: fine. Left shoe/foot: stupid, and dumb, and crazy! What is WRONG with my left shoe, or perhaps my left foot. I have this pair of shoes that my wife bought for me about a year and a half ago, I love them. They're brown casual shoes, and I think she got them for really cheap, but they still look like new and they're really comfortable. However, the left lace has some sort of something something wrong with it which allows it to come undone so often during the day, that occasionally I just let it stay undone (seriously, like 5 or 6 times a day ... my right shoe has not once come undone that I'm aware of.) So, I sit here in my chair, creating websites, and my shoe unties itself. Sounds like a wonderful story, will make a note to start a novel. A few weeks ago my wife was kind enough to buy me a super duper nice pair of Doc Martens, and they're nice and comfy and guess what: Yes, that's right, the left lace comes undone on these shoes too. I'm beginning to think I'm harboring ghosts in my left foot, or socks. Or maybe my toes are being mischevious. I'm very afraid.