Thanks for the Summer sausage clarification, @ARE_you_kidding_me.
Eating hotdogs cold depends on the quality of the dog. Cheap ones will coat the inside of your mouth with grease. Now I eat the veggie version, which is usually intolerable cold. Like eating hotdog flavored Knox Blox.
Of course, corndogs (which they make an excellent veggie version!) and cold hot dogs are largely vehicles for ketchup, IMO. Some of the few things enhanced by sweet tomato sauce.