The following is an excerpt from Soldiers in Training by Brother Daryl Coats.

"In 1907 actress Annette Kellerman was arrested on Boston's Revere Beach and charged with indecent exposure for wearing in public her "usual vaudeville costume": a tight-clinging "boy's black woolen racing suit" that bared her legs, arms, and neck. Do you or your church have lower standards in 2006 than the city of Boston had in 1907?

While cleaning out my files I came across the following passage which I had clipped from an academic journal:

Inadequate as it may seem now, a revolution in women's dress and behavior occurred after World War I. Women bobbed their hair [contrary to 1 Corinthians 11:15But if a woman have long hair, it is a glory to her: for her hair is given her for a covering.
See All..., in context], elevated skirt lengths from the ankle to the knee or above [Isaiah 47:2-3 [2] Take the millstones, and grind meal: uncover thy locks, make bare the leg, uncover the thigh, pass over the rivers. [3] Thy nakedness shall be uncovered, yea, thy shame shall be seen: I will take vengeance, and I will not meet thee as a man.
See All...] ... The use of cosmetics [2 Kings 9:30And when Jehu was come to Jezreel, Jezebel heard of it; and she painted her face, and tired her head, and looked out at a window.
See All... and Ezekiel 23:40And furthermore, that ye have sent for men to come from far, unto whom a messenger was sent; and, lo, they came: for whom thou didst wash thyself, paintedst thy eyes, and deckedst thyself with ornaments,
See All...], which before the war was mainly restricted to aristocrats, actresses, and prostitutes, became universal.

Long before girls in the 1980s started dressing like Madonna, their grandmothers and great-grandmothers were dressing like the actresses and whores of the 1920s and 1930s. The actual decline of American culture began 40 years before (and planted the seeds that brought forth fruit in) the various "movements" and "revolutions" of the 1960s.