A participant, riding a horse and dressed as a knight, presents flowers to women during an event marking Valentine's Day in central Moscow, Russia, February 14, 2016. (Photo by Maxim Zmeyev/Reuters)

(L-R) Models Lindsay Ellingson, Adriana Lima, and Doutzen Kroes attend the Victoria's Secret Angels Valentine's Day Event at Victoria's Secret, SoHo on February 8, 2012 in New York City. (Photo by D. Dipasupil/Getty Images)

A Colombian flower grower selects a rose for a bouquet ahead of Valentine's Day in Subachoque, February 2, 2015. Colombia is the world's second-largest flower exporter behind the Netherlands. The Andean country exports around 500 million flowers to the U.S. for Valentine's Day, according to the Colombia Flower Growers Association. (Photo by John Vizcaino/Reuters)

Youths kick a gay rights activist during a protest against a proposed new law termed by the State Duma, the lower house of Parliament, as “against advocating the rejection of traditional family values” in central Moscow June 11, 2013. (Photo by Maxim Shemetov/Reuters)

A marcher dressed as Marilyn Monroe during the annual Gay Pride march in London, July 1994. (Photo by Steve Eason/Hulton Archive/Getty Images)

A contestant poses for a photograph backstage ahead of the Miss Gay Jozi pageant in Johannesburg, May 23, 2015. (Photo by Siphiwe Sibeko/Reuters)

A couple kisses during a LGBT Pride parade in Oviedo, northern Spain, June 28, 2016. (Photo by Eloy Alonso/Reuters)