Unless we are exposed to various cultural groups and learn how others perceive us and the world around them, we will likely have a narrow or naïve view of the world and assume that others see things the way we do.
I was recently in Nepal and before that in Indonesia and other parts of Asia and Europe. I have witnessed many different cultures and learned what they value, in comparison to myself. In Nepal, they value modesty and so when I went swimming I had to cover up. This felt odd for me because in the US we don't have to do that, in fact, we feel comfortable not. I think it is important for everyone to expand their cultural horizons and gain a greater understanding of what other parts of the world value in stead of living a narrow-minded life. It is important to use that schemata to interpret different aspects of your life.