The sin of the modern dance is found in its appeal to the flesh.
Few things are more contrary to the spiritual well being of a young person than the modern dance.
The lust ignited and inflamed by the modern dance is a deep, driving, destroying desire for satisfaction of unlawful sexual desire in the unmarried couple. This is induced and increased by unchaste handling and contact of the bodies of two normal, healthy people. That may have been written as a joke, but it is too true to be funny. The main appeal of the modern dance is sex appeal for the man. What is lawful is not lust, and usually loses its strength or ability to attract as it once did before marriage.