Close up of a couple, with the woman holding the man's knee, underneath a table. (Photo by Peter Dazeley/Getty Images)

Couple getting intimate on couch. (Photo by Vincent Besnault/Getty Images)

Female female male threesome. My bit on the side is my best male friend. (Photo by Laoshi/Getty Images)

A Hindu devotee is helped by other people as she walks on burning coals during a religious procession Vel Festival of the Hindu goddess Maha Mariamman (Sheetla Mata), in New Delhi, India, 06 April 2017. People get their bodies pierced with different kinds of metal needles and rods and participate in a religious procession as thanks giving gesture to the goddess in return of their fulfilled wishes during the annual procession. (Photo by Rajat Gupta/EPA)

Mourning woman. (Photo by Rich Legg/Getty Images/iStockphoto)

Three female friends dancing in nightclub. (Photo by Cultura Creative (RF)/Alamy Stock Photo )

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