I have discovered something that's very interesting. My shoes are a little worn, and the inner soles are loose. And whenever I take my shoes off, if I remember and try not to remove the inner soles, the inner soles always end up being partially pulled out of the shoes. Frightfully inconvenient. However, if I'm in a rush and don't think about, the inner soles always seem to stay in place.
Isn't that interesting?