"Dancing (1) Dancing in general is recognized as an art and a beautiful form of expressing human emotion. (2) Obscene dances are those: (a) Which suggest or represent sexual actions, whether performed solo or with two or more; (b) Which are designed to excite an audience, to arouse passions, or to cause physical excitement. HENCE: Dances of the type known as "Kooch" or "Can-Can," since they violate decency in these two ways, are wrong. Dances with movement of the breasts, excessive body movement while the feet remain stationary, the so-called "belly dances" these dances are immoral, obscene, and hence altogether wrong."
January 1, 1970
https://en.wikiquote.org/wiki/Hays_Code