Human bisexuality has mainly been studied alongside homosexuality. Van Wyk and Geist argue that this is a problem for sexuality research because the few studies that have observed bisexuals separately have found that bisexuals are often different from both heterosexuals and homosexuals. Furthermore, bisexuality does not always represent a halfway point between the dichotomy. Research indicates that bisexuality is influenced by biological, cognitive and cultural variables in interaction, and this leads to different types of bisexuality.
In California, the School Success and Opportunity Act authored by Assemblyman Tom Ammiano, which became state law on January 1, 2014, says "A pupil shall be permitted to participate in sex-segregated school programs and activities, including athletic teams and competitions, and use facilities consistent with his or her gender identity, irrespective of the gender listed on the pupil's records."
In June 2018, arguing that her right to privacy and equality had been violated, amounting to a breach of the Basic Law, and the Hong Kong Bill of Rights Ordinance; a Hong Kong lesbian woman known as "MK" filed a lawsuit against the Hong Kong Government for denying her the right to enter into a civil partnership with her female partner. The High Court heard the case in a preliminary brief 30-minute hearing in August 2018, and it is expected to be heard in the first half of 2019. In April 2019, a judge rejected a bid by a Hong Kong Catholic diocese and other conservative groups to join litigation and ruled that the court can not arbitrate on social or theological issues and works only on legal considerations, as the counsel for Catholic diocese had argued outcome of court case could lead to ‘reverse discrimination’ and have chilling effect on the church. The case is scheduled to be heard on 28 May 2019.
Anthropologists have struggled to determine a definition of marriage that absorbs commonalities of the social construct across cultures around the world. Many proposed definitions have been criticized for failing to recognize the existence of same-sex marriage in some cultures, including in more than 30 African cultures, such as the Kikuyu and Nuer.
Though the reality was that the Stonewall riots themselves, as well as the immediate and the ongoing political organizing that occurred following them, were events fully participated in by lesbian women, bisexual people and transgender people as well as by gay men of all races and backgrounds, historically these events were first named Gay, the word at that time being used in a more generic sense to cover the entire spectrum of what is now variously called the 'queer' or LGBT community.
The term bisexuality is mainly used in the context of human attraction to denote romantic or sexual feelings toward both men and women, and the concept is one of the three main classifications of sexual orientation along with heterosexuality and homosexuality, all of which exist on the heterosexual–homosexual continuum. A bisexual identity does not necessarily equate to equal sexual attraction to both sexes; commonly, people who have a distinct but not exclusive sexual preference for one sex over the other also identify themselves as bisexual.
Some Hindu texts mention homosexuality and support it. The Kamasutra mentions homosexuality as a type of sexual pleasure. There are also legends of Hindu gods change gender or are hermaphrodites and engage in relations that would be considered homoerotic in the other case. Homosexuality was also practiced in the royal families especially with servants. Kamasutra also mentions the "svairini" who used to live by herself or with another woman. The king Bhagiratha is described as being born of sexual union of two queens of the king Dilip, however there is also a patriarchal background represented as the king left no heir and his younger wife took on the role of a man.
A flag with a seven-striped rainbow design is used in Peru, Bolivia and Ecuador as a symbol of native peoples, and is anachronistically associated with Tawantin Suyu, or Inca territory. Although commonly believed in Peru to be a flag of the Incan Empire, the oldest known rainbow flag dates back only to 18th century and was used by Túpac Amaru II during his pro-indigenous revolt against the Spanish. María Rostworowski, a Peruvian historian known for her extensive and detailed publications about Peruvian Ancient Cultures and the Inca Empire, said about this: "I bet my life, the Inca never had that flag, it never existed, no chronicler mentioned it". The National Academy of Peruvian History has stated on the topic:
In upholding gay marriage bans in Kentucky, Michigan, Ohio and Tennessee on Nov. 6, 2014, 6th US District Court of Appeals Judge Jeffrey S. Sutton wrote that "marriage has long been a social institution defined by relationships between men and women. So long defined, the tradition is measured in millennia, not centuries or decades. So widely shared, the tradition until recently had been adopted by all governments and major religions of the world."  In the Oct. 15, 1971 decision Baker v. Nelson, the Supreme Court of Minnesota found that "the institution of marriage as a union of man and woman, uniquely involving the procreation and rearing of children within a family, is as old as the book of Genesis."  John F. Harvey, MA, STL, late Catholic priest, wrote in July 2009 that "Throughout the history of the human race the institution of marriage has been understood as the complete spiritual and bodily communion of one man and one woman."  
Another parade, this time billed as an international event, was scheduled to take place in the summer of 2005, but was postponed to 2006 due to the stress on police forces during in the summer of Israel's unilateral disengagement plan. In 2006, it was again postponed due to the Israel-Hezbollah war. It was scheduled to take place in Jerusalem on November 10, 2006, and caused a wave of protests by Haredi Jews around central Israel. The Israel National Police had filed a petition to cancel the parade due to foreseen strong opposition. Later, an agreement was reached to convert the parade into an assembly inside the Hebrew University stadium in Jerusalem. June 21, 2007, the Jerusalem Open House organization succeeded in staging a parade in central Jerusalem after police allocated thousands of personnel to secure the general area. The rally planned afterwards was cancelled due to an unrelated national fire brigade strike which prevented proper permits from being issued. The parade was postponed once more in 2014, as a result of Protective Edge Operation.
In spite of these similarities, these two groups should not be and cannot be thought of as one. The truth is that the vast majority of people with intersex conditions identify as male or female rather than transgender or transsexual. Thus, where all people who identify as transgender or transsexual experience problems with their gender identity, only a small portion of intersex people experience these problems.
At the beginning of the gay rights protest movement, news on Cuban prison work camps for homosexuals inspired the Mattachine Society to organize protests at the United Nations and the White House, in 1965. Early on the morning of Saturday June 28, 1969, lesbian, gay, bisexual, and transgender persons rioted following a police raid on the Stonewall Inn in the Greenwich Village neighborhood of Manhattan, New York City. The Stonewall Inn was a gay bar which catered to an assortment of patrons, but which was popular with the most marginalized people in the gay community: transvestites, transgender people, effeminate young men, hustlers, and homeless youth.
Individuals who are transgender and transsexual do not identify with the sex and/or gender constructs they were born into. People who are transgender feel a disconnect between their own internal concept of their gender and the gender roles made by their society. For example, someone born male may not feel much, if any, connection to what his culture has defined as being "masculine" and may instead strongly identify with what is typically defined as being "feminine."
^ Doussantousse, S. (2005) "...The Lao Kathoey's characteristics appear to be similar to other transgenders in the region..." in Male Sexual Health: Kathoeys in the Lao PDR, South East Asia – Exploring a gender minority Archived 2007-08-19 at the Wayback Machine from the Transgender ASIA Research Centre Archived 2007-08-23 at the Wayback Machine. Retrieved 2007-07-22.
The anti-LGBT discourse of these times equated both male and female homosexuality with mental illness. Inspired by Stokely Carmichael's "Black is Beautiful", Gay civil rights pioneer and participant in the Annual Reminders Frank Kameny originated the slogan "Gay is Good" in 1968 to counter social stigma and personal feelings of guilt and shame.
A January 2013 Datamonitor poll found that 54.1% of respondents were in favour of same-sex marriage. A May 2013 Ipsos poll found that 42% of Italians supported allowing same-sex couples to marry and adopt children. An October 2014 Demos poll found that 55% of respondents were in favour of same-sex marriage, with 42% against. A Pew Research Center survey showed that 59% of Italians were in favour of legalising same-sex marriage.
In a poll in June 2013 for ifop, 63% approved of same-sex marriage. After the National Council's Committee of Law Affairs' decision to approve same-sex marriage, two opinion polls released on show of 22 February 2015ed a support of 54% (Léger Marketing for Blick) and 71% (GfS Zürich for SonntagsZeitung) allowing same-sex couples to marry and adopt children. Additionally, in November 2016, voters in the canton of Zürich overwhelmingly rejected an initiative seeking to ban same-sex marriage in the cantonal Constitution, with 81% voting against. A 2017 poll found that 75% of Swiss were in favour of same-sex marriage.
Additional Conditions Due to the societal pressure to conform, some transgender people can experience depression, anxiety, panic, substance abuse issues, and/or suicidal ideations. Due to the societal pressure to conform, some transsexual people can experience depression, anxiety, panic, substance abuse issues, suicidal ideations and/or social isolation.
On June 30, 2016, the United States Department of Defense removed the ban that prohibited transgender people from openly serving in the US military. On July 27, 2017, President Donald Trump tweeted that transgender Americans will not be allowed to serve "in any capacity" in the United States Armed Forces. Later that day, Joint Chiefs of Staff Chairman Joseph Dunford announced, "there will be no modifications to the current policy until the president’s direction has been received by the Secretary of Defense and the secretary has issued implementation guidance."
While the first bill, proposed by the Executive Yuan, would apply most of the marriage rights stated in the Civil Code to same-sex couples, the other two, which are based on suggestions from conservative groups and are respectively proposed by Democratic Progressive Party (DPP) Legislator Lin Tai-hua (林岱樺) and Chinese Nationalist Party (KMT) Legislator Lai Shyh-bao (賴士葆), would offer fewer rights to same-sex couples.
Distinctions between the terms transgender and transsexual are commonly based on distinctions between gender (psychological, social) and sex (physical). Hence, transsexuality may be said to deal more with physical aspects of one's sex, while transgender considerations deal more with one's psychological gender disposition or predisposition, as well as the related social expectations that may accompany a given gender role. Many transgender people prefer the designation transgender and reject transsexual. For example, Christine Jorgensen publicly rejected transsexual in 1979, and instead identified herself in newsprint as trans-gender, saying, "gender doesn't have to do with bed partners, it has to do with identity." This refers to the concern that transsexual implies something to do with sexuality, when it is actually about gender identity.[note 3] Some transsexual people, however, object to being included in the transgender umbrella. The definitions of both terms have historically been variable.
The rainbow flag has found wide application on all manner of products. The rainbow flag colors are routinely used as a show of LGBT identity and solidarity. The rainbow colors have become so widely recognized as a symbol of LGBT pride and identity that they have effectively replaced most other LGBT symbols, including the Greek letter lambda and the pink triangle. One common item of jewelry is the pride necklace or freedom rings, consisting of six rings, one of each color, on a chain. Other variants range from key chains to candles. In Montreal, the entrance to Beaudry metro station, which serves that city's Gay Village, was rebuilt in 1999 with rainbow-colored elements integrated into its design.
When someone is born with sex characteristics that differ from what is typically seen as female or male traits, they are known as intersex. For instance, in some cases, a person’s body has both male and female characteristics. Another instance is where a person’s chromosomal make-up is neither typically male nor female. These characteristics might be present at birth or become more apparent during or after puberty.
Because this view considers biological reproduction a sort of social obligation, its advocates tended to frame individuals’ legal and moral commitment to one another as a matter of genetic relatedness. In cases of inheritance or custody, for instance, they generally defined the parents’ legal duties to their biological children differently than those to their stepchildren. Among groups who feel strongly that same-sex marriage is problematic, there is also a tendency for the legal relationships of spouses, parents, and children to converge. Typically, these societies provide for the automatic inheritance of property between spouses, and between parents and children, and allow these close kin to co-own property without joint ownership contracts. In addition, such societies often allow close kin a variety of automatic privileges such as sponsoring immigration visas or making medical decisions for one another; for those with whom one shares no close kin relationship, these privileges typically require legal interventions. Such legal circumventions are usually more difficult for, and in some cases even prohibited to, same-sex couples.