Going au natural was considered not only natural, but beautiful, in ancient Greece. The nude athlete is a powerful image in Greece. It is said that when a runner named Orsippus of Megara lost his loincloth in the midst of a sprint, he was said to run even faster, gaining him victory and fame. Running naked became a competitive advantage.
As archaeologists like Heinrich Schliemann, who uncovered the site of ancient Troy in the late 19th century, captured the imagination of people the world over, the thinking and customs of the ancient Greece became idealized. The nude athlete in particular was de rigeur in posters advertising the early Olympic Games.
In fact, from 1912 to 1936, the male body was the main feature of the Olympic poster, with the 1912 Stockholm Olympic poster being the most, how shall we say, intriguing, showing that there’s a lot you can do with a ribbon. And after World War I ravaged Europe, the Olympics came to Antwerp, Belgium in 1920, where the poster also employed a fully nude man, private parts covered this time by a swirling towel.
The French were not so revealing, but the poster for the 1924 Paris Olympics did emphasize the bare chests and midriffs of virile young men ready to go into athletic battle. The poster for the 1928 Amsterdam Olympics was less suggestive, but still featured a yearning half-nude man.
Then, there are the prudish Americans, who featured a man of chiseled musculature, but whose torso was covered by a white t-shirt.
The Germans in 1936, the Brits in 1948 and the Finns in 1952 all did variations on a theme with the male body, until the Aussies came along and changed the look and feel dramatically. They removed the human, and replaced it with, what looks like a card, or invitation to the Olympic Games.
Nude guys were no longer a thing.