Facebook has come under fire after a picture of two men kissing was apparently removed from the site because it infringed publishing rules of posting images of a “sexual” or “delicate” nature.

The snap was uploaded by Madrid-Based Visible Cultura LGTB to promote its Gay Arts Looks For A Home documentary.

But it was taken down for reportedly breaching decency codes, which bar images of a “political, sexual or other sensitive” nature, El Pais reported.

Facebook has claimed the image was removed as the result of a technical issue and the social networking giant is investigating.

Visible Cultura has since replaced the image – with a CENSORED stamp across it.

The page administrators have posted a response: “Can a kiss between two men be inappropriate?

"Apparently, Facebook thinks so. This image has just been censored when LGTB Non Goverment Spanish Culture Association VISIBLE tried to use it in a paid add (sic) in Facebook to promote a crowdfunding project. The image is by artist Juan Hidalgo.

“Until when are we going to put up with this Facebook nonsense? Are we really in the 21st century?

The documentary being promoted by the group, “brings together a thousand works of gay and lesbians donated by over four hundred artists from thirty countries,” El Pais said.

Twitter users have criticised Facebook for its actions.

@papershadow
Leon Mar

#Fail > @Facebook removes gay kiss photo, ironically an ad for a cultural project against #homophobia ( http://t.co/GcAZ8nte ) #LGBT

March 23, 2012 2:45 pm via shareaholic app Reply Retweet Favorite

@jrossignol
jean rossignol

Facebook Removes Gay Kiss Photo, an Ad Against Homophobia, still dont understand why LGBT stay on F*b http://t.co/7aNREerC via @AddThis

March 23, 2012 2:09 pm via Tweet Button Reply Retweet Favorite

Visible Cultura have since replaced the original image (above) with the 'censored' version below

Check out some of our favorite same-sex kisses below:

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• U.S Navy Petty Officers Share Same-Sex Kiss

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• Spanish Gay Couple Upstages Al-Jazeera Reporter

  One couple certainly got their opinion about the victory of Spain's Mariano Ranjoya and his conservative People's Party cross in an unusual way by "videobombing" an Al Jazeera reporter, kissing passionately as the hapless correspondent spoke on the election.

• Kurt & Blaine's 'Glee' Kiss

  Gleeks rejoiced after the much-anticipated kiss between Kurt and Blaine. Several months later, the characters' first love scene drew additional praise (and controversy).

• Prop 8 Ruled Unconstitutional

  Breana Hansen (L) and Monica Chacon kiss as they celebrate outside of San Francisco City Hall on Feb. 7, 2012 in San Francisco after a three-judge panel of the 9th U.S. Circuit Court of Appeals ruled that the voter-approved Proposition 8 measure violates the civil rights of gay men and lesbians.

• Tim Tebow & Demaryius Thomas

  Although the Denver Broncos quarterback filmed a Superbowl commercial in 2010 for the anti-gay, anti-abortion organization Focus On The Family (FOTF), he seems to have no problem sharing a male-on-male lip-lock in front of thousands (millions?) of onlookers when he kissed teammate Demaryius Thomas.

• Gay 'Wedding' In China

  In March 2011, gay couples kiss during a ceremonial 'wedding' as they try to raise awareness of the issue of homosexual marriage, in Wuhan, in central China's Hubei province.

• 'As The World Turns' Makes History

  The first gay kiss on daytime television was shared between characters Luke and Noah on "As The World Turns" in 2007.

• Euro Pride In Poland

  Participants kiss as they march during the 2010 Euro Pride gay parade in Warsaw, Poland.

• Heinz Ad

  This ad featured two fathers kissing and drew over 200 complaints from concerned parents who were upset they "had to explain same-sex relationships to their offspring." Heinz ended up pulling the ad.

• Spain's 'Kiss-In'

  A gay couple kisses as Pope Benedict XVI (R) waves to faithful from his popemobile on his way to Cibeles square in Madrid, on Aug. 18, 2011, before a welcoming ceremony.

• Adam Lambert's Controversial Kiss

  After sharing a kiss with his male bandmate on the 2009 American Music Awards, Lambert's performance due to take place later that week on 'Good Morning America' was canceled. The morning show said he was too racy for their viewers, but many believed homophobia was at play.

• Belgium's Kiss-In

  A gay couple kiss during a kiss-in flashmob to denounce the violence against members of the homosexual community in Brussels last year.

• First Gay Kiss On Primetime Television

  In 2000, "Dawson's Creek" showed the first gay kiss on a primetime dramatic television show when characters Jack and Ethan locked lips.

• Gay Protest In Greece

  A gay couple kisses on Feb. 14, 2011 during a protest against the Greek state's refusal to recognise same-sex marriages on Athens' Ermou St, the capital's main shopping thoroughfare.

• 'Brokeback Mountain' Reunion Kiss

  Sorry, Michelle Williams -- our favorite part of this Oscar-winning epic was the passionate reunion kiss between Ennis Del Mar (Heath Ledger) and Jack Twist (Jake Gyllenhaal)

• Roseanne's Lesbian Kiss

  In 1994 "Roseanne" aired a lesbian kiss between the title character and Sharon, played by Mariel Hemingway. The episode was almost pulled by ABC who was worried about reactions to the kiss, but ultimately it was aired and seen by 30 million people.

• Gay Couple Enjoys Purim

  Israelis and foreigners of the gay community enjoy a Purim party as they celebrate in Tel Aviv.

• 'Modern Family' Gay Kiss Controversy

  After fans noticed that gay couple Cam and Mitchell hadn't shared a kiss, they started a successful Facebook campaign to get the producers of "Modern Family" to have the characters share more intimate moments.

• Chuck Bass' 'Gossip Girl' Kiss

  As is the case with most of his storylines, Chuck Bass' man-on-man smooch had a secretly devious intention. Still, we couldn't help but love watching the hit show's resident bad boy (played by the ever-dashing Ed Westwick) lock lips with a man in this much-hyped sequence.

• Washington DC Approves Same-Sex Marriage

  Darlene Garner (L) and Candy Holmes (R), both are reverends of Metropolitan Community Churches, exchange kisses during their wedding ceremony on the first day same-sex couples were legal to wed under a new law March 9, 2010.

• Ally & Ling on 'Ally McBeal'

  Certainly groundbreaking for its time when it aired in 1999, a hot kiss between Ally (Calista Flockheart) and Ling (Lucy Liu) took place after the latter character's erotic dream. As <a href="http://www.afterellen.com/TV/allymcbeal.html" target="_hplink">After Ellen notes</a>, both women ultimately concluded that what they really want out of a relationship is 'a penis,' but were at least willing to consider the possibility that they might be 'gay.'

• 'Cruel Intentions' Girl-Girl Kiss

  "After the hours that Selma Blair and I practiced, we felt ready to go out there," Sarah Michelle Gellar said of her steamy "Cruel Intentions" kiss in 1999. "And I think it showed. Our motto was 'Rehearse, rehearse, rehearse." Looks like the rehearsal paid off: the pair were awarded the Best Kiss award at the MTV Movie Awards the following year.

• 'Kiss In' At San Francisco's Harvey Milk Plaza

  J. Inness (L) and Drew Staffen kiss in front of the Castro Theatre during a 'Kiss-In' to recognize the International Day Against Homophobia in San Francisco.

• Kiss-In In France

  People kiss at the Trocadero, in front of the Eiffel Tower in Paris during a "kiss-in" operation for the world day against homophobia.