Could also have done without the hot dog and fries being bundled together so that the fries are steamed to a soggy mess by the time you get to a place where you can sit down and unwrap everything and eat ... but I guess that's a topic for a different thread.
That's because you wasted vital hot-dog-eating minutes getting ketchup! The bare hint of onion and mustard that the French fries pick up from being next to them is what makes them sublime.
I keep ketchup packages in my glove compartment basically for Gene's and Jude's. That way the kids can have the stuff on theirs. That said, I have a theory about this whole ketchup magillah, which is, in other parts of the country a hot dog tends to be milder, even sweeter, certainly less garlicky, and ketchup is appropriate on it, judge not lest ye be judged, the blander meat needs some saucing up to be fully flavorful. A Chicago dog is a different thing, closer to European sausage traditions and spice profiles, and that's where ketchup is overkill-- and the spartan simplicity of mustard, onion and relish to accent, not sauce but accent, is exactly right. So I don't condemn ketchup on hot dogs, but it's superfluous on a good authentic Chicago dog (as is all that other celery salt tomato pickle peppers stuff).
Me, I put it on the blandish dog at the
movie theater, but never anywhere else in Chicagoland.