Young men and young women may work systematically six days in the
week and rise fresh in the morning, but let them attend modern dances for
only a few hours each evening and see what happens. The Waltz, Polka,
Gallop and other dances of the same kind will be disastrous in their effects
to both sexes. Health and vigor will vanish like the dew before the sun.
        It is not the extraordinary exercise which harms the dancer, but
rather the coming into close contact with the opposite sex. It is the
fury of lust craving incessantly for more pleasure that undermines the
soul, the body, the sinews and nerves. Experience and statistics show
beyond doubt that passionate excessive dancing girls can hardly reach
twenty-five years of age and men thirty-one. Even if they reached that
age they will in most instances be broken in health physically and morally.
This is the claim of prominent physicians in this country.
                -- Quote from a 1910 periodical