Food is not just what we put in our mouths to fill up; it is culture and identity. Reason plays some role in our decisions about food, but it's rarely driving the car.
The rate of population growth in the United States is slightly below that required to reproduce itself.
Every year I just kept going back to gymnastics, but I didn't start out training 10 hours a day. When I turned 10 or 11, I got more serious and I focused a lot on making it to the elite level, and from there I just kept going.