School? I'm a bit too old for school...
The simple fact, as mentioned above, is the Wales is not a country in it's own right, but a Wales, England, Scotland and N. Ireland are simply subdivisions of the country called the United Kingdom, and Great Britain within that.
And I don't care about Rugby. It's only been popular (properly popular) since we won it. Before then, and in a few years, it's support will have died down again.