Have you ever bought a new car and then noticed everyone is driving the same car? I started running last year and now I am surprised how everyone runs. I grew up in the suburbs of Chicago. When I moved to Tucson my new girl friend was from Chicago. A new boyfriend was from Chicago. My sister's roommates were ALL from Chicago. I remember thinking everyone is from Chicago. I have pondered this phenomena. Critical thinking has helped me understand. Click here if you are curious? When I start a thought with everyone I know rethinking is the happiest thing I can do.