Germany is after all crazy about sausages, and it is really part of the culture and heritage. Every year, Germans eat about 800 million sausages, which means that Germans eat 1,500 bites per minute.
The specialty here is the winning German upgraded hot dog we know. It's called the "currywurst" and it's a sliced sausage, with a sauce like ketchup, but it's really not ketchup. In fact, this sauce changes from place to place and each stall prepares it in its own taste. Curry 36, say the Berliners, is the best place in town!
By the way, the story of these sauces was born after World War II, when there was no bread and therefore the curry was sold without a bun. But ketchup was not in Germany either. So, without tomatoes and no money to prepare or import real ketchup, the “currywurst” stalls invented sauces that resembled it but were different.