It is important to find the perspective of studied cultures instead of making conclusions based on your current perspective.
Context requires a historian to think about the conditions, values, and norms of a time period in which an event occurs.
In the Body Ritual of the Nacirema, it would be easy to judge the behaviors of the group when coming from a 21st century, culture bias. However, upon realizing it is about America (it is spelled backwards), you can see how the behaviors can be explained when put into context.