Because they come in fat, regular and slim sizes, just like us Americans. Because they wear blue jeans, all the time. Because they wear running shoes. Because their new literature is really good. Because they are very prominent in the environmental movement. Because people ride bikes as transportation. Because they have bike paths and walking trails every where.
When we were to meet our friends in Konstanz, I was debating whether or not to wear our running shoes and finally decided to wear them because we figured we would do a lot of walking. We met them and they were both wearing running shoes. Ursula was even wearing shorts. (Our joke is that you can always tell when an American is on vacation – he is wearing shorts! I find the longer I live in the US, the more I like wearing shorts – especially on vacation!)