My sister recently came to visit in New York. Since she loves hot dogs, I decided to treat her to some homemade hot dogs. We went shopping at the  supermarket for the  ingredients. When we got back, it was about noon so we got into the kitchen to prepare the lunch. We had brought some meat , paprika garlic and some celery. After frying the  celery, we mixed it with the paprika and garlic and used it to add flavor to the meat. I stuffed meat into the casings while my sister cut the buns. We then set the sausages to cook in the oven for about thirty minutes. We sat recounting how our mother used to teach us how to cook when we were younger and how she always corrected us when we were wrong. After the sausages were cooked , we put them between the buns. Such a delicious lunch. 
Question: Why did they make a hot dog?
Wanted to please sister visiting