Florin Bors, aged 8 from Bacau, northern Romania, wearing a bear fur takes a break from performing a holiday season ritual in Bucharest, Romania, Tuesday, December 16, 2014. In pre-Christian rural traditions, dancers wearing colored costumes or animal furs, touring house to house in villages singing and dancing to ward off evil. In recent years following the economic downturn in Romania, a European Union member since 2007, the tradition has moved to Romania's cities where dancers travel to perform the ritual for money. (Photo by Octav Ganea/AP Photo/Mediafax)

A street artist dances tango in Buenos Aires, Argentina, Tuesday, January 20, 2015. Tango is a partner dance that originated in the 1890's along the Rio de la Plata, the border between Uruguay and Argentina. UNESCO approved in 2009, a joint proposal by the two nations to include the dance in its Intangible Cultural Heritage List. (Photo by Rodrigo Abd/AP Photo)

A member of the Eton public school O.T.C. (Officers Training Corps) practising shouting out orders during a training session, 20th January 1940. (Photo by Hulton Archive/Getty Images)

A protester uses molotov cocktails against riot police during May Day protests on May 1, 2010 in Athens, Greece. (Photo by Milos Bicanski /Getty Images)

Erotic members-only club Snctm in Los Angeles, California, USA on January 28, 2017. A masqued black-tie dinner that evolves over the course of the night from amuse bouche to what founder, Damon Lawner, calls “erotic theater”, where female performers. Some guests engage, some engage only with each other (while women can buy a ticket, men cannot attend unless they’re members ($10,000-$50,000), part of a couple, or reserve dinner), and others choose not to touch at all. The monthly event at a Holmby Hills mansion is not a sеx or swingers party, but instead is about exploring the boundaries of what sеx means, and how it inherently makes us all feel. (Photo by Elizabeth Lippman)

Canada's Marissa Papaconstantinou makes her way to the finish line after falling in the Women's 200m T44 Final during day ten of the IPC World ParaAthletics Championships 2017 at London Stadium on July 23, 2017 in London, England. (Photo by Peter Cziborra/Reuters)

Saraa Mutawkil (R), 18, practises boxing at Al Rabie club in Omdurman May 10, 2016. (Photo by Mohamed Nureldin Abdallah/Reuters)

A child blowing confetti from her hands during a Carnival parade in Cyprus' coastal city of Limassol, Sunday, March 13, 2016. Limassol's long-established parade is Cyprus' biggest and most famous, drawing revelers from across the east Mediterranean island. This year's parade drew huge crowds as people sought lighthearted reprieve from the bailed-out country's recession. The parade marks the start of the 40-day fasting period of Lent in the run-up to the Orthodox Christian Easter. (Photo by Petros Karadjias/AP Photo)