It was brought to me already prepared. I was hungry. I had few options.
Here’s the thing: it was a damn tasty dog. Who knew?
I will no longer arch my eyebrows at anyone who professes enjoyment from such a sandwich.
It’s not going to be my default, but I acknowledge that I learned something from the experience.
mmm
A real man would have gone hungry.
I usually prepare two dogs, one with mustard and one with ketchup, both with grilled onions or additional toppings. I then alternate between the two.
If I had to choose, it’d be ketchup.
I trust, Mean Mr. Mustard, this doesn’t signify a new screen name for you.
I’ve always eaten my dogs with ketchup. Not that I care what condiment snobs think anyway - it’s a HOT DOG. We’re not talking prime rib, fercryinoutloud!!!
I suggest Ketchup is the new Mustard.
I like them with mustard **and **ketchup, onions and relish. I don’t want to miss out on anything.
Or with mustard and sauerkraut.
My late husband (God bless him) ate hot dogs with mayonnaise. Other than that, he was a great guy.
ETA. Hmmm…shouldn’t this be in Cafe Society, as it concerns Fine Dining?
I don’t like it on regular dogs, but, for some reason, it works on a cheese dog for me. Actually, I’ve been on a Heinz 57 kick lately, so that’s what I’ve most recently been putting on cheese dogs, but similar kind of idea, except tangier. Mustard works, too, on a cheese dog, but maybe the ketchup + cheese thing is just taking me back to my childhood, where my cousin and I would go to the local hot dog stand and order dogs with a slice of American cheese and ketchup on it.
I’ll do mayo on a dog sometimes, too, but that’s if I’m doing a Sonoran dog or Tijuana/“danger dog” kind of thing. See here for those unfamiliar. I do mine in a flour tortilla, though.
Peanut butter on hot dogs is the way to go. 
I’ve always maintained that hot dogs and catsup are mutually inclusive. That is, hot dogs are.only edible with catsup and catsup is only edible on a hot dog.
I prefer ketchup. Though I really prefer cheese. :o
Burger King (which now sells hot dogs) puts both ketchup and mustard on their dogs, along with chopped onions and relish. It’s not bad.
Ahem.
Ketchup + mustard + cooked onion + finely chopped raw onion + slice of very crisp bacon = RobDog.
While not quite the same, I LOVE peanut butter on my breakfast link sausages. I’d never thought of putting it on hot dogs. HMM.
One of us! One of us! Gooble gobble, one of us!
Well, did you at least partake joyously of No Hot Dog Buns?
I refer you to the classic column by the Perfect Master, in which he explains why ketchup should not be put on a properly assembled hot dog:
Why is there no ketchup on a properly made hot dog?
Let’s pop this over to Café Society
Ketchup is for French fries. Keep your tomatoey mitts away from my hot dog!
Ketchup is the ultimate condiment, and goes on everything.
I’m a bit of a hotdog snob*, and I always eat my dogs with everything - ketchup, mustard, relish, sauerkraut, and anything else they have.
*For credentials, I offer: This, where I spent many an hour playing pinball and eating hotdogs when I was in college.
