DMC: I beg to differ. Burritos are pretty much the same thing as soft tacos.
Mexican popular tradition tells the story of a man named Juan Mendez who used to sell tacos in a street stand, using a donkey as a transport for himself and the food, during the Mexican Revolution period (1910-1921) in the Bella Vista neighborhood in Ciudad Ju?rez, Chihuahua. To keep the food warm, Juan had the idea of wrapping the food placed in a large home made flour tortilla inside individual napkins. He had a lot of success, and consumers came from other places around the Mexican border looking for the "food of the Burrito," the word they eventually adopted as the name for these large tacos.
TheRealTJ: All the burritos I've seen have had lettuce 
In the United States, however, fillings generally include a combination of ingredients such as Mexican rice, beans, lettuce, salsa, meat, guacamole, cheese, and sour cream
EDIT: Proofish 
Tacos and buritos are nothing alike, actually. Burritos are rolled, mostly flour tortilla, and often larger. Tacos are often hard shelled, seldom
rolled, mostly corn tortilla, and usually smaller.
A taquito is similar to a taco, because it is normally hard shelled and can be corn tortilla. But, it is also similar to a burrito because it is rolled,
and sometimes flour tortilla.
So, since the taquito belongs within both categories, it just as easily belongs in neither, because it would be continuously pulled to either
side. Therefore, the taquito is the odd one out.
OTHER ANSWER.
In the song, "Taco flavored kisses" in an episode of Southpark, taquito is not mentioned, but tacos and burritos are.
