In what is now the United States and Canada, many Native American and First Nations peoples recognized the existence of more than two genders, such as the Zuñi male-bodied Ła'mana, the Lakota male-bodied winkte, and the Mohave male-bodied alyhaa and female-bodied hwamee. Such people were previously referred to as berdache but are now referred to as Two-Spirit, and their spouses would not necessarily have been regarded as gender-different. In Mexico, the Zapotec culture includes a third gender in the form of the Muxe.
A person's internal, deeply held sense of their gender. For transgender people, their own internal gender identity does not match the sex they were assigned at birth. Most people have a gender identity of man or woman (or boy or girl). For some people, their gender identity does not fit neatly into one of those two choices (see non-binary and/or genderqueer below.) Unlike gender expression (see below) gender identity is not visible to others.
^ Page, Michael. "Bi Pride Flag". Archived from the original on 29 January 2007. Retrieved 16 February 2007. The pink color represents sexual attraction to the same sex only, homosexuality, the blue represents sexual attraction to the opposite sex only, heterosexuality, and the resultant overlap color purple represents sexual attraction to both sexes (bi).
The Sydney Gay & Lesbian Mardi Gras is the largest Australian pride event and one of the largest in the world. The inaugural event was held on 24 June 1978, and was organised by the Gay Solidarity Group and was intended to be a street festival, one of three events as part of a Day of International Gay Solidarity, produced in response to a call from the organisers of the San Francisco Gay Freedom Day, and highlighting local gay and lesbian rights issues. Following a police riot and assault at the end of the street festival, 53 were arrested; with over 120 more arrested at subsequent protests. The then Sydney Gay Mardi Gras subsequently became an annual event from 1979. The parade is held at night with ~12,000 participants on and around elaborate floats.
The history of same-sex marriage in the United States dates from the early 1970s, when the first lawsuits seeking legal recognition of same-sex relationships brought the question of civil marriage rights and benefits for same-sex couples to public attention though they proved unsuccessful. The subject became increasingly prominent in U.S. politics following the 1993 Hawaii Supreme Court decision in Baehr v. Miike that suggested the possibility that the state's prohibition might be unconstitutional. That decision was met by actions at both the federal and state level to restrict marriage to male-female couples, notably the enactment at the federal level of the Defense of Marriage Act.
Some researchers have criticized the conclusions drawn from the study by saying that the measures of sexual arousal were too crude to capture the richness of sexual attraction that includes more than genital and self-reported arousal while watching 2 minute video clips. In a New York Times article, Dr. Gilbert Herdt, director of the National Sexuality Resource Center in San Francisco, was quoted as saying, "To claim on the basis of this study that there's no such thing as male bisexuality is overstepping, it seems to me."
American Medical Association, American Academy of Pediatrics, American Psychological Association, American Psychiatric Association, American Association for Marriage and Family Therapy, National Association of Social Workers, American Psychoanalytic Association, American Academy of Family Physicians; et al. "Brief of [medical organizations] as Amici Curiae in Support of Petitioners" (PDF). supremecourt.gov. Retrieved 5 April 2018.
Civil rights campaigning in support of marriage without distinction as to sex or sexual orientation began in the 1970s. In 1972, the now overturned Baker v. Nelson saw the Supreme Court of the United States decline to become involved. The issue became prominent from around 1993, when the Supreme Court of Hawaii ruled in Baehr v. Lewin that it was unconstitutional under the state constitution for the state to abridge marriage on the basis of sex. That ruling led to federal and state actions to explicitly abridge marriage on the basis of sex in order to prevent the marriages of same-sex couples from being recognized by law, the most prominent of which was the 1996 federal DOMA. In 2003, the Massachusetts Supreme Judicial Court ruled in Goodridge v. Department of Public Health that it was unconstitutional under the state constitution for the state to abridge marriage on the basis of sex. From 2004 through to 2015, as the tide of public opinion continued to move towards support of same-sex marriage, various state court rulings, state legislation, direct popular votes (referendums and initiatives), and federal court rulings established same-sex marriage in thirty-six of the fifty states.