Dian Hanson's: The History of Men's Magazines. Volume 3. 1960s At the Newsstand

The Sexual Revolution in Men's Magazines
How the 1960s liberated the world's newsstands

Sexual revolution, civil rights, Flower Power, miniskirt, women's liberation, The Pill, Black Panthers, hippies; all these words and phrases entered our language in the turbulent 1960s. The decade started as an extension of the domestic '50s and ended with worldwide chaos as baby boomers reached sexual maturity. What a fun decade for men's magazines.
While Playboy's world dominance grew, with France, Germany, England, and Italy producing “men's lifestyle” titles, diversification spread in the U.S. The first big breast magazines debuted, with Fling, Gem and The Swinger; men's adventure titles – with nudes – provided nostalgia for mid-life veterans; humor magazines hung on – barely – while hippie nudist titles exploited a legal loophole allowing them to show pubic hair.
Italy finally joined the party with sexy fumetto photo comics and a hero named Supersex.