Is it possible to have an ‘asian fetish’ or a ‘black fetish’? Or must the object of fetishism be a part of the body or some material object? Wikipedia seems to sway toward the latter, but I’m wondering what others think on this important issue.

You might rather say that a person has a racial preference. A related question might be, is it possible to be so preferential towards a particular race that it becomes a fetish?