Okay, some explanation for all points: the (french-) maid costume was created by Elvaerwyn, I only created the beer-bottles
. The dress is used in this form in uniform fetishism, you normally will classify this as a piece of lingerie. Since the Japanese also create (comic/manga) characters wearing this dress, you will find it as a costume in cosplay. However there is a historic background which we always should be aware of:
https://en.wikipedia.org/wiki/French_maid (see picture from 1906)
A "Tracht" (traditional costume) is totally different. When you look at the Oktoberfest, traditional Bavarians hate these sexy pseudo-dresses which were sold to the tourists. The real "Tracht" is rather unsexy:
https://en.wikipedia.org/wiki/Trachtand refers to more than only Bavaria. I was born in Northern Germany and also there you will find clothes called "Tracht", they look different ...
https://upload.wikimedia.org/wikipedia/commons/thumb/9/9f/Friesentracht.JPG/450px-Friesentracht.JPGSame with Poland, Czech Republic, Denmark, Slovenia ... you will find traditional clothes similar to a "Tracht".
Normally these clothes are worn on festive days. Doing a real traditional costume means a lot of work. Maybe I should try one as an example in the future.
Nutrition: Putting mustard on a pretzel is a bit weird over here. But sometimes, especially when you eat a Bavarian veal sausage with sweet mustard and a pretzel this happens by accident.
Here is an assumption why the pretzel was modeled with mustard (German only, sorry);
http://www.kurun.de/blog/2011/07/15/die-brezeln-und-der-senf/To conclude: Because it tastes like nothing without a dip on it.
And blaming that to U.S. guys would be unfair, because sometimes they taste like nothing even here ... and it might be a solution to avoid that
But yes, I prefer the traditional Nuremberg form