Singers Britney Spears(L), Madonna, and Christina Aguilera perform onstage during the 2003 MTV Video Music Awards at Radio City Music Hall on August 28, 2003 in New York City. (Photo by Frank Micelotta/Getty Images)

A South Korean woman clad in a Santa Claus costume kisses Danbi, a three-year-old orangutan, during an event to help more unfortunate people in this year-end season on December 22, 2004 in Seoul, South Korea. (Photo by Chung Sung Jun/Getty Images)

Models kiss on the runway at the Rock and Republic Spring 2006 show during Mercedes-Benz Fashion Week at Sony Studios on October 19, 2005 in Culver City, California. (Photo by Vince Bucci/Getty Images)

Two Chinese young women kiss during a rock band performance at the Midi Music Festival on May 3, 2006 in Beijing, China. (Photo by Andrew Wong/Getty Images)

A pair of Swedish fans kiss prior to the FIFA World Cup Germany 2006 Group B match between Sweden and Paraguay played at the Olympic Stadium on June 15, 2006 in Berlin, Germany. (Photo by Shaun Botterill/Getty Images)

Elena Katina (L) and Julia Volkova (R) of the Russian girl band Tatu, perform and then kiss on stage at the Olympic Hall on September 19, 2006 in Seoul, South Korea. (Photo by Chung Sung-Jun/Getty Images)

Monkeys kiss at the monkey temple called Phra Prang Sam Yot on February 16, 2004, about 160 kilometers north of Bangkok, in Lopburi, Thailand. (Photo by Paula Bronstein/Getty Images)

Attendees take photos as two women kiss at the abbywinters.com booth at the 2008 AVN Adult Entertainment Expo and the Sands Expo and Convention Center January 9, 2008 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images)

Two girls kiss after the opening of the Oktoberfest beer festival on September 20, 2008 in Berlin, Germany. (Photo by Andreas Rentz/Getty Images)

A group of graduating year 12 students kiss on the beach front during the opening night celebrations of Schoolies week in Surfers Paradise on November 21, 2008 on the Gold Coast, Australia. Schoolies is the annual celebration by year 12 students following the culmination of their HSC exams. The celebrations happen in several official locations throughout Australia, but the Gold Coast kicks off the celebrations as the Queensland exams finish ahead of all other states. (Photo by Sergio Dionisio/Getty Images)

Models kiss on the catwalk during the Lambertz Monday Night Schoko & Fashion at the Alten Wartesaal on February 3, 2009 in Cologne, Germany. (Photo by Friedemann Vogel/Getty Images)

Award-winners, Italian actress Monica Bellucci (L) and model Elle Macpherson kiss each other during Women's World Awards show on February 5, 2009 in Vienna, Austria. (Photo by Johannes Simon/Getty Images)

Jennifer Lopez and Kate Moss attend the TOPSHOP TOPMAN private dinner to celebrate the flagship store opening at Balthazar on April 1, 2009 in New York City. (Photo by Bryan Bedder/Getty Images)

French First Lady Carla Bruni-Sarkozy (R) greets U.S. First Lady Michelle Obama upon their arrival at Rohan Palace on April 4, 2009 in Strasbourg, France. (Photo by Sean Gallup/Getty Images)

A young woman snaps a picture of the work in progress by Russian artist Dmitry Vrubel showing former Soviet leader Leonid Brezhnev (L) kissing former communist East German leader Erich Honecker at a surviving portion of the Berlin Wall on June 22, 2009 in Berlin, Germany. The painting is on a portion of the Wall known as the East Side Gallery, and city authorities have invited artists to redo their works as part of a restoration effort. The Berlin Wall was built by the East German government and divided East and West Berlin from 1961 until 1989. (Photo by Sean Gallup/Getty Images)

Verona Pooth (L) kisses Sophia Thomalla at the after show party to “Tribute To Bambi 2009” at The Station on October 9, 2009 in Berlin, Germany. (Photo by Andreas Rentz/Getty Images)

Actress Sophia Thomalla and Verona Pooth attend the Tribute To Bambi 2009 party at the station on October 9, 2009 in Berlin, Germany. (Photo by Florian Seefried/Getty Images for P&C)

Valeria Solarino kisses Isabella Ragonese as they attend the “Viola Di Mare” Premiere during day 2 of the 4th Rome International Film Festival held at the Auditorium Parco della Musica on October 16, 2009 in Rome, Italy. (Photo by Paolo Bruno/Getty Images)

Adult film actresses Asa Akira (L) and Angelina Valentine kiss as they present an award during the 27th annual Adult Video News Awards Show at The Pearl concert theater at the Palms Casino Resort January 9, 2010 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images)

Actresses Meryl Sctreep (L) and Sandra Bullock accept the Best Actress award onstage during the 15th annual Critics' Choice Movie Awards held at the Hollywood Palladium on January 15, 2010 in Hollywood, California. (Photo by Kevin Winter/Getty Images for VH1)

Models showcase designs by Kate Sylvester at the finale of her catwalk on the third day of Rosemount Australian Fashion Week Spring/Summer 2010/11 at the Overseas Passenger Terminal, Circular Quay on May 5, 2010 in Sydney, Australia. (Photo by Stefan Gosatti/Getty Images)

Actress Evangeline Lilly gives a kiss as she attends “The Princess Of Montpensier” Premiere at the Palais des Festivals during the 63rd Annual Cannes Film Festival on May 16, 2010 in Cannes, France. (Photo by Andreas Rentz/Getty Images)

Two girls kiss on the red carpet at the “Tender Son – The Frankenstein Project” Premiere at the Palais des Festivals during the 63rd Annual Cannes Film Festival on May 22, 2010 in Cannes, France. (Photo by Sean Gallup/Getty Images)

Joana Beckers (L) and Felicia Matthes (R) kiss the trophy after the Women B Juniors final match between Turbine Potsdam and 1899 Hoffenheim at the Sportforum Waldstadt on June 13, 2010 in Potsdam, Germany (Photo by Jan Kuppert/Bongarts/Getty Images)

German football supporters are seen while watching the 2010 FIFA World Cup match between Germany and Ghana at a live public viewing on a large screen monitor at FIFA Fanmeile on June 23, 2010 in Berlin, Germany. (Photo by Matthias Kern/Getty Images)

Singer Joelina Drews (L), 15 year old daughter of singer Juergen Drews, kisses her mother Ramona Drews (R) after her first gig at the Berlin Press Ball 2011 at the Ullstein hall on January 8, 2011 in Berlin, Germany. (Photo by Andreas Rentz/Getty Images)

Gay men and women gather outside the John Snow pub in Soho to stage a group kiss on April 15, 2011 in London, England. (Photo by Dan Kitwood/Getty Images)

Singers Britney Spears (L) and Rihanna perform onstage during the 2011 Billboard Music Awards at the MGM Grand Garden Arena May 22, 2011 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images for ABC)