The mambo dance that was spearheaded by Pérez Prado and was popular in the 1940s and '50s in Cuba, Mexico, and New York is completely different from the modern dance that New Yorkers now call "mambo" and which is also known as salsa "on 2". The original mambo dance contains no breaking steps or basic steps at all. The Cuban dance was not accepted by many professional dance teachers. Cuban dancers would describe mambo as "feeling the music", in which sound and movement were merged through the body. Professional dance teachers in the US saw this approach to dancing as "extreme", "undisciplined", and thus deemed it necessary to standardize the dance to present it as a salable commodity for the social and ballroom market.