The American Academy of Pediatrics has stated that "sexual orientation probably is not determined by any one factor but by a combination of genetic, hormonal, and environmental influences." The American Psychological Association has stated that "there are probably many reasons for a person's sexual orientation and the reasons may be different for different people". It further stated that, for most people, sexual orientation is determined at an early age. The American Psychiatric Association stated: "To date there are no replicated scientific studies supporting any specific biological etiology for homosexuality. Similarly, no specific psychosocial or family dynamic cause for homosexuality has been identified, including histories of childhood sexual abuse." Research into how sexual orientation may be determined by genetic or other prenatal factors plays a role in political and social debates about homosexuality, and also raises fears about genetic profiling and prenatal testing.
In December 2012, the state of São Paulo likewise had same-sex marriage legalized by court order. Same-sex marriages also became equalized in relation to opposite-sex ones between January 2012 and April 2013 by court order in Alagoas, Ceará, Espírito Santo, the Federal District, Mato Grosso do Sul, Paraíba, Paraná, Piauí, Rondônia, Santa Catarina and Sergipe, and in Santa Rita do Sapucaí, a municipality in Minas Gerais. In Rio de Janeiro, the State Court facilitated its realization by district judges in agreement with the equalization (instead of ordering notaries to accept same-sex marriages in demand as all others).
Marriage is not only for procreation, otherwise infertile couples or couples not wishing to have children would be prevented from marrying. Ability or desire to create offspring has never been a qualification for marriage. From 1970 through 2012 roughly 30% of all US households were married couples without children, and in 2012, married couples without children outnumbered married couples with children by 9%.  6% of married women aged 15-44 are infertile, according to the US Centers for Disease Control and Prevention.  In a 2010 Pew Research Center survey, both married and unmarried people rated love, commitment, and companionship higher than having children as "very important" reasons to get married, and only 44% of unmarried people and 59% of married people rated having children as a very important reason.  Several US presidents never had their own biological children, including George Washington, often referred to as "the Father of Our Country."   As US Supreme Court Justice Elena Kagan noted, a marriage license would be granted to a couple in which the man and woman are both over the age of 55, even though "there are not a lot of children coming out of that marriage." 
Gilbert Baker, an openly gay activist born in 1951, grew up in Parsons, Kansas, and went on to serve in the US army for about two years around 1970. After an honorable discharge, Gilbert taught himself to sew. In 1974, Baker met Harvey Milk, an influential gay leader, who three years later challenged Baker to come up with a symbol of pride for the gay community. The original gay pride flag flew at the San Francisco Gay Freedom Day Parade celebration on June 25, 1978. It has also been suggested that Baker may have been inspired by Judy Garland's singing "Over the Rainbow" and the Stonewall riots that happened a few days after Garland's death (she was one of the first gay icons). Another suggestion for how the rainbow flag originated is that at college campuses during the 1960s, some people demonstrated for world peace by carrying a Flag of the Races (also called the Flag of the Human Race) with five horizontal stripes (from top to bottom they were red, white, brown, yellow, and black). The first rainbow flags were commissioned by the fledgling pride committee and were produced by a team led by Baker that included artist Lynn Segerblom. Segerblom was then known as Faerie Argyle Rainbow; she created the original dyeing process for the flags. Baker is said to have gotten the idea for the rainbow flag from the Flag of the Races in borrowing it from the Hippie movement of that time largely influenced by pioneering gay activist Allen Ginsberg. The flag originally comprised eight stripes; Baker assigned specific meaning to each of the colors:
Pansexual, omnisexual, anthrosexual, and pomosexual (postmodern sexuality) are substitute terms that, rather than referring to both or "bi" sex attraction, refer to all or "omni" sex attraction and are used mainly by those who wish to express acceptance of all sex possibilities, including transgender and intersex people, not just two. Pansexuality sometimes includes an attraction for less mainstream sexual activities, such as BDSM. Some people who might otherwise identify as pansexual or omnisexual choose to self-identify as bisexual because the term bisexual is more widely known, and because they see it as an important term in identity politics.
registered partnership proposed 2019 Constitutional ban since 1997 (Article 18 of the Constitution is generally interpreted as limiting marriage to opposite-sex couples)[b] LGBT individuals may adopt, but not same-sex couples Bans some anti-gay discrimination Transgender people allowed to change gender but require undergoing medical treatment such as HRT or surgery. No provisions for nonbinary people.
According to the statistics, female couples were four times more likely to have children than male couples. Additionally, male couples earned a pretax average of $165,960 per year, while lesbian couples earned $118,415 and straight couples earned $115,210. Most female same-sex marriages were celebrated in Oakland, Seattle, San Francisco, Springfield (MA) and Portland (OR), whereas most gay male marriages were performed in San Francisco, Washington D.C., New York City, Seattle and Fort Lauderdale.
 I am wanting to spread the word since I’m convinced my lifestyle can work equally well for millions of other couples. In the process it can help wean us all away from the warrior ideal of maleness, which has been the dominant note for far too long. Lovers seeking to have sex with me are infinitely more attractive than would-be warriors seeking to do battle with me. They are also much healthier for the planet.
The Bible, in Leviticus 18:22, states: "Thou shalt not lie with mankind, as with womankind: it is abomination," thus condemning homosexual relationships.  In Islamic tradition, several hadiths (passages attributed to the Prophet Muhammad) condemn gay and lesbian relationships, including the sayings "When a man mounts another man, the throne of God shakes," and "Sihaq [lesbian sex] of women is zina [illegitimate sexual intercourse]."  The Catholic Church, United Methodist Church, Southern Baptist Convention, Church of Jesus Christ of Latter-day Saints, National Association of Evangelicals, and American Baptist Churches USA all oppose same-sex marriage.  Two orthodox Jewish groups, the Orthodox Agudath Israel of America and the Orthodox Union, also oppose gay marriage, as does mainstream Islam.   According to a July 31, 2003 statement from the Congregation for the Doctrine of the Faith and approved by Pope John Paul II, marriage "was established by the Creator with its own nature, essential properties and purpose. No ideology can erase from the human spirit the certainty that marriage exists solely between a man and a woman…"  Pope Benedict stated in Jan. 2012 that gay marriage threatened "the future of humanity itself." 
Health-practitioner manuals, professional journalistic style guides, and LGBT advocacy groups advise the adoption by others of the name and pronouns identified by the person in question, including present references to the transgender person's past. Many also note that transgender should be used as an adjective, not a noun (for example, "Max is transgender" or "Max is a transgender man", not "Max is a transgender"), and that transgender should be used, not transgendered.
The flag was originally created with eight colors, but pink and turquoise were removed for production purposes, and since 1979 it has consisted of six colored stripes. It is most commonly flown with the red stripe on top, as the colors appear in a natural rainbow. Aside from the obvious symbolism of a mixed LGBT community, the colors were determined to symbolize:
The French Government introduced a bill to legalize same-sex marriage, Bill 344, in the National Assembly on 17 November 2012. Article 1 of the bill defining marriage as an agreement between two people was passed on 2 February 2013 in its first reading by a 249–97 vote. On 12 February 2013, the National Assembly approved the entire bill in a 329–229 vote.
The first gay pride parade in Mexico occurred in Mexico City in 1979, and it was attended by over a thousand people. Ever since, it has been held annually under different slogans, with the purpose of bringing visibility to sexual minorities, raising awareness about HIV/AIDS, fighting homophobia, and advocating for LGBT rights, including the legalization of civil unions, same-sex marriages, and LGBT adoption. In 2009, more than 350,000 people attended the gay pride march in Mexico City—100,000 more than the previous year. Guadalajara has also held their own Guadalajara Gay Pride every June since 1996, and it is the second largest gay pride parade in the country. Gay pride parades have also spread to the cities of Monterrey, León, Guanajuato, Puebla, Tijuana, Toluca, Cancun, Acapulco, Mérida, Xalapa, Cuernavaca, Chihuahua, Matamoros, Saltillo, Mazatlan, Los Cabos, Puerto Vallarta, and Hermosillo, among others.
Same-sex marriage in the United States expanded from one state in 2004 to all fifty states in 2015 through various state court rulings, state legislation, direct popular votes, and federal court rulings. The fifty states each have separate marriage laws, which must adhere to rulings by the Supreme Court of the United States that recognize marriage as a fundamental right that is guaranteed by both the Due Process Clause and the Equal Protection Clause of the Fourteenth Amendment to the United States Constitution, as first established in the 1967 landmark civil rights case of Loving v. Virginia.
In ruling Texas' gay marriage ban unconstitutional, San Antonio-based federal judge Orlando Garcia stated that the ban "causes needless stigmatization and humiliation for children being raised by the loving same-sex couples being targeted."  Children of unmarried same-sex couples are denied the stability that comes with having married parents, including the guarantee of child support in the case of divorce and an automatic legal connection to both parents.  If no legal relationship is established, the child cannot be sure of receiving financial support from the non-biologically related partner, and is not guaranteed an inheritance if that partner dies without leaving a will. 
On Saturday, June 27, 1970, Chicago Gay Liberation organized a march from Washington Square Park ("Bughouse Square") to the Water Tower at the intersection of Michigan and Chicago avenues, which was the route originally planned, and then many of the participants spontaneously marched on to the Civic Center (now Richard J. Daley) Plaza. The date was chosen because the Stonewall events began on the last Saturday of June and because organizers wanted to reach the maximum number of Michigan Avenue shoppers. Subsequent Chicago parades have been held on the last Sunday of June, coinciding with the date of many similar parades elsewhere.
In December 2012, the Prime Minister, David Cameron, announced that, whilst he favoured allowing same-sex marriage within a religious context, provision would be made guaranteeing no religious institution would be required to perform such ceremonies. The third reading took place on 21 May 2013, and was approved by 366 votes to 161. On 16 July 2013, the Commons accepted all of the Lords' amendments. On 17 July 2013, the bill received royal assent becoming the Marriage (Same Sex Couples) Act 2013, which came into force on 13 March 2014. The first same-sex marriages took place on 29 March 2014.
Prior to Obergefell, same-sex marriage was legal to at least some degree in thirty-eight states, one territory (Guam) and the District of Columbia; of the states, Missouri, Kansas, and Alabama had restrictions. Until United States v. Windsor, it was only legal in 12 states and District of Columbia. Beginning in July 2013, over forty federal and state courts cited Windsor to strike down state bans on the licensing or recognition of same-sex marriage. Missouri recognized same-sex marriages from out of state and same-sex marriages licensed by the City of St. Louis under two separate state court orders; two other jurisdictions issued such licenses as well. In Kansas, marriage licenses were available to same-sex couples in most counties, but the state did not recognize their validity. Some counties in Alabama issued marriage licenses to same-sex couples for three weeks until the state Supreme Court ordered probate judges to stop doing so. That court's ruling did not address the recognition of same-sex marriages already licensed in Alabama, but referred to them as "purported 'marriage licenses'". In two additional states, same-sex marriages were previously legal between the time their bans were struck down and then stayed. Michigan recognized the validity of more than 300 marriage licenses issued to same-sex couples and those marriages. Arkansas recognized the more than 500 marriage licenses issued to same-sex couples there, and the federal government had not taken a position on Arkansas's marriage licenses.
On 15 November 2011, the Hong Kong College of Psychiatrists, as a licensing body of professional psychiatrists in Hong Kong, published an announcement stating that homosexuality is not an illness and there is no scientifically proven evidence to support the attempts to change one's sexual orientation. Until February 2012, the announcement has not been uploaded onto the College's website or published in any professional journals; it is, however, available in electronic pdf format upon request. The Hong Kong College of Psychiatrists is the very first professional authority in Asia that explicitly and publicly opined their professional standing on issues regarding homosexuality and treatments altering one's sexual orientation.
The existence of religious pluralities within a country seems to have had a less determinate effect on the outcome of same-sex marriage debates. In some such countries, including the United States, consensus on this issue was difficult to reach. On the other hand, the Netherlands—the first country to grant equal marriage rights to same-sex couples (2001)—was religiously diverse, as was Canada, which did so in 2005.
For many years, leading advocate groups such as Community Business, have worked to promote and advance the extension of non-discrimination policies in the corporate sector for LGBT minorities. Only a limited number of multinational companies have explicitly embraced such policies, namely Goldman Sachs and IBM. Only a handful of local and China-based companies have extended non-discrimination protection to LGBT employees, including blue-chip stock companies.
Harvard University historian Nancy F. Cott stated that until two centuries ago, "monogamous households were a tiny, tiny portion" of the world's population, and were found only in "Western Europe and little settlements in North America." Polygamy has been widespread throughout history, according to Brown University political scientist Rose McDermott, PhD.   Interracial marriage was once illegal in a majority of US states, and was still banned in half of US states until the 1950s.  Official unions between same-sex couples, indistinguishable from marriages except for gender, are believed by some scholars to have been common until the 13th Century in many countries, with the ceremonies performed in churches and the union sealed with a kiss between the two parties.