Bathing suit models are shown listening to the radio on the beach, circa 1940's. (Photo by Bettmann Archive/Getty Images)

People participate in the annual Afropunk Music festival on August 27, 2016 in New York City. (Photo by Stephanie Keith/Getty Images)

An American soldier walks ahead of an MKIV (Mark IV) British-made tank, circa 1918. (Photo by Hulton Archive/Getty Images)

Mature woman lying on bed, rear view. (Photo by Andersen Ross/Getty Images)

Samurai commiting seppuku (hara-kiri) in Japan, circa 1880. (Photo by adoc-photos/Corbis via Getty Images)

A publican serves a glass of stout to a donkey in the East End of London, 1960s. (Photo by Steve Lewis/Getty Images)

Women in lingerie touching each other. (Photo by BDLM/Getty Images)

Germany, Business couple making love under desk. (Photo by Roman Maerzinger/Getty Images)