When I was a boy, I told my father I wanted a fish. I meant that I wanted a little orange goldfish in a small bowl that might live on the kitchen counter, just like other kids have. My dad knew that. But instead of buying me a goldfish, he went to the pet shop and purchased a 20-gallon aquarium with a bunch of expensive tropical fish. The fish were fun for a day, but I was seven or eight or nine years old.