Marilyn Monroe and Hugh Hefner were born in the same year and buried in the same graveyard. But as Louise Perry points out in her book “The Case Against the Sexual Revolution,” they met completely different fates. Marilyn died a tortured sex symbol of the burgeoning sexual revolution, while Hefner lived large as the quintessential playboy, capitalizing on the same sexual liberalism. “The story of the sexual revolution isn’t only a story of women freed from the burdens of chastity and motherhood, although it is that,” Perry writes. “It is also a story of the triumph of the playboy —...