I know some people think this is wrong, but I don't know why.
I like hot dogs with chili, mustard, and cheese
ketchup, mustard, and relish (Dodger Dogs)
I know some people just cringe at ketchup on a hot dog and some places won't serve it, but I have never had it explained satisfactorily. XH just about flipped when he saw his own children eating ketchup on hot dogs.