The 1972 For the Strength of Youth Pamphlet advises against "salacious films, objectionable TV programs... and immoral material in any form."
For the Strength of Youth... LDS Standards (Salt Lake City, UT: The Church of Jesus Christ of Latter-day Saints, 1972), 15-16
Literature, TV, Entertainment
Youth should rigidly and energetically resist at all times, unclean stories, jokes, reading or printed matter, salacious films, objectionable TV programs, immodest or degrading advertising, and immoral material in any form. Such material is an affront to right living and clean thinking and must be rejected wherever one comes in contact with it in social experiences, in entertainment, or in school. Youth must assert themselves in making choices and demanding only that which is uplifting.