There are some other examples - I think you've had some good outfits with them, and shuit and heirloom on SZ have done similar looks that were really well-done. I think it's less a function of ethnicity and more one of (perceived) comfort - if you wear skinny jeans 28 days out of the month and skirt-like hakamas the other 2-3, there's a disharmony there, especially if none of the other cultural elements (Japanese, African, whatever) of what's being referenced are present. If you're not Nigerian, don't live in Nigeria, don't really have much other interest in Nigerian culture, and dress Western 95% of the time, wearing that outfit you described every once in awhile is odd; to me, anyway, obviously a lot of people don't agree. Anyway, even if I think it doesn't work more often than not I think it's cool that you guys are trying it.
edit - though I guess you could ask "how do you know those things aren't there" and the answer is I don't, I'm just basing this on what I can see.
What the fuck are we allowed to dress in, then? this is a pretty narrow view of fashion, and of global culture in general. There's a difference between saying "well, I think that's beautiful but i live in the Bible Belt and I'll get my fucking ass kicked by blue collar types or oil derrick workers on the way home from work and it's just not worth it" - which is at least honest - and saying that you shouldn't wear something because it's "not from your culture." Or whatever the fuck sort of half-assed intellectualism you're trying to put together over there. Maybe your words aren't coming out right, but right now you sound like an idiot. Do you mean that people should understand what they're wearing? Because that would make a bit more sense, to a limited extent, but then we might as well have another discussion of hipsterism and the random appropriation of cultural signifiers, which is perhaps more relevant, but I don't know that we can handle it at this point. If you live in a climate that supports it, I'm not sure why you wouldn't just wear what you like. I'd feel like a cock wearing a kandora around a place where it's culturally significant, but reading through any expat forum will show you that it's done.
It's particularly amusing that this discussion revolves around Parker's wardrobe choices - to all appearances, he lives on a coast in a tolerant, global, fairly cosmopolitan city and embraces what he has described as a "coastal" style. Considering he seems to wear Yohji pretty damn regularly, I don't really understand the complaint. I'm not seeing any problem with that. Even if it were Robbie who had all of a sudden decided to wear a rick skirt, I don't see a problem with changing things up if you feel like it.