After wearing shoes for a period of time, why does the tongue of shoes tilt to both sides?

It's not the shoes. It is possible to buy any shoes. The main reason is that the way of walking is wrong, or the foot leans to one side when walking, and the tongue naturally leans to one side when walking too much. Of course, the worse the quality, the more crooked the shoes are. If you don't believe me, you can look at your shoes. When shoes are worn for a long time, one side is seriously worn and the other side is slightly worn.