Ketchup on a dog?

I grew up in the Shermer of John Hughes’ movies.
Deerfield, Upper Arlington, Glencoe, and Northbrook.
There was a great Chicago Dog place called Ira’s in Northbrook.
The ketchup bottles at the counters were there for fries.
Just fries.
And you did not dare get ketchup near the dogs.
You got yelled at by the owner if you put ketchup on the dogs.
Ketchup was on the menu, between relish and mustard.
But you never asked for it. Ever.
When I go to Minutemaid for a game, I’ll get cheese and onions and mustard.
Maybe chili.
But never, ever ketchup.