 Not for $29. Well, you can have a bite of mine. That's fine. All right. Some hot dog fun facts. Mustard is the most popular topping in America. It's actually considered wrong to eat your hot dog with ketchup or a knife and fork. 7-Eleven sells 100 million grilled dogs every year. Americans eat more than 25 million hot dogs at baseball games every year. And the Germans claim hot dogs were invented in 1487 in the city of... Hot dog?