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

Portrait beautiful woman on the beach, Landing aircraft above the beach at Phuket Airport. Mai Khao beach, one of the most popular beaches among tourists in Phuket. (Photo by Southtownboy/Getty Images/iStockphoto)

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

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

Woman and man playing domination games in bed. (Photo by NDAB Creativity/Rex Features/Shutterstock)

In this May 14, 2016 photo, children wearing their school backpacks climb on a cliff using a bamboo ladder on their way home from school in Zhaojue county, southwest China's Sichuan province. A village in China's mountainous west where schoolchildren must climb an 800-meter (2,625-foot)-high bamboo ladder secured to a sheer cliff face may get a set of steel stairs to improve it's safety. (Photo by Chinatopix via AP Photo)

Coulpe in bed, secret lover hiding. (Photo by Peter Cade/Getty Images)

Cropped shot of a woman flirtatiously touching leg of man in a suit with her foot under the table. (Photo by LightField Studios/Skyfish Digital Media/Getty Images)