You can make a hot dog just by leaving your dog in the car on a warm day, but DO NOT DO THIS, because your dog might DIE from heat stroke! And if that happens, you will feel guilty and horrible for the rest of your life, which is not how you want to feel, right? So remember, you have been warned!
But anyway, now that I said that, I will go on and talk about a much better kind of hot dog, and that is the kind that you eat. Hot dogs are like sausages, except they are already cooked before you buy them. Mostly they are made out of beef, pork, chicken, or turkey. When Mom was a kid, her dad used to tell her that hot dogs were made out of the stuff they swept up off the floor at the place where meat is processed. Of course, this didn't keep Mom from eating hot dogs anyway, since they taste so good. And it didn't really keep her dad from eating hot dogs either.
The history of the hot dog is kind of hard to figure out because lots of people seem to have got the idea to put a sausage between two pieces of bread. Frankfurters come from a town named Frankfurt in Germany, and wieners were invented in Vienna, Austria. In the U.S., about 1870 on Coney Island, a man named Charles Feltman, who was an immigrant from Germany, started selling sausages in rolls. Which is how the Coney Island Dog got started.
You could buy a hot dog in Chicago in 1893 at the World's Columbian Exposition or at the St. Louis World's Fair in 1904. And then pretty soon people started eating hot dogs at baseball games and amusement parks and picnics, and they are still doing this today.
Some hot dogs have a casing made of sheep intestines, and this is what holds all that meat stuff together while the hot dogs are being cooked. There are also skinless hot dogs, and these are cooked in a cellulose tube that is taken off before the hot dogs get packaged.
Here is a picture of the World's Longest Hot Dog, which was made in Tokyo in 2005 for the All-Japan Bread Association's 50th Anniversary. This hot dog is 60.3 meters long. I think it looks totally yummy, and I'm wondering if there is any of it left that I could eat!