Analysis:

There are many theories about the origin of hot dogs. Traditionally, hot dogs originated in Frankfurt, Germany. At the beginning of the 20th century, there was a snack on the streets of Frankfurt-fried sausage. Because the freshly fried sausage oil is hot, the stall owners have prepared many gloves for people to use. But it's too much trouble. Gloves are always lost and often washed, which is unsanitary. So stall owners always hope to have a good way to solve the problem. One day, a little boy and his mother came to a booth to buy sausages. At that time, he was holding a piece of bread in his hand and said to the stall owner, "Please put the sausage on that one-sided bag." Later, the boy folded the bread in half and put the little red sausage in the middle.

The stall owner watched the boy's movements and suddenly had a brainwave and came up with a good idea. He ordered a batch of boat-shaped bread, opened a crack in the middle and put sausages in it to sell together. This will not be hot, and gloves will be saved. Moreover, the sausage is sandwiched in the bread, and the exposed part looks like a red-tongued puppy, which is very popular. People call it "hot dog" from now on.

The other one said:

In fact, the "hot dog" comes from Knight Square in new york. At that time, there will be some vendors pushing hot water carts and shouting, "Come and buy hot sausages." They store sausages in hot water carts to make them hot, fragrant and fresh. Later, an American cartoonist drew this scene, but he didn't know how to spell the word "dachshund", so he simply found a similar "dog" instead! So "hot sausage" became "hot dog sausage"

Another explanation:

The origin of hot dogs

Hot dog is a kind of sausage, that is, processed meat, which was recorded as early as the ninth century BC. Sausages are meat cured with spices. Long ago, it was not easy to prevent meat from going bad. Adding spices to meat can make it not rot so quickly, and can cover up its strange smell when the meat is not fresh.

Both Austrians and Germans claim that hot dogs were invented by themselves. The word wiener comes from Vienna, Austria and the word Frankfurt comes from Frankfurt, Germany. Both names refer to hot dogs, but who first called this sausage-like thing "hot dog"? This has also caused a lot of controversy. German immigrants brought a dachshund that looked like a sausage from their hometown to the United States. Because this kind of dog looks like sausages that Germans like to eat, it is generally believed that the word "hot dog" is named after this kind of puppy.

Another explanation:

At that time, German immigrants in the American continent improved the sausages in their hometown to be eaten by hand, that is, put them in bread for people to eat by hand. Later, this kind of food became very popular because it was very convenient. At that time, a cartoonist in a newspaper thought that the sausage sandwiched in bread looked like "sausage", so he published a cartoon similar to a hot dog in a certain issue of the newspaper. And gave him the title of "hot dog" (because he can't spell sausage in English, hot dogs look like sausages). From then on, everyone called hot dogs (because they are easier to spell)