Sexuality and gender identity-based cultures are subcultures and communities composed of people who have shared experiences, backgrounds, or interests due to common sexual or gender identities. Among the first to argue that members of sexual minorities can also constitute cultural minorities were Adolf Brand, Magnus Hirschfeld, and Leontine Sagan in Germany. These pioneers were later followed by the Mattachine Society and the Daughters of Bilitis in the United States.

Not all persons of various gender and sexual orientations identify or affiliate with a particular subculture. Reasons include geographic distance, unawareness of the subculture's existence, fear of social stigma, or personal preference to remain unidentified with sexuality- or gender-based subcultures or communities. Some have suggested that the identities defined by the Western heterosexualized cultures are based on sexuality, have serious flaws, and often leave no space for the public to discuss these flaws of gender and sexuality. This leaves many rejecting these identities in large numbers, often while disowning their own sexual needs and possibly subjecting them to be classified under what they may consider misclassified sexual identities.

Sexuality and gender identity-based cultures

LGBT culture

LGBT culture is the common culture shared by lesbian, gay, bisexual, and transgender people and communities. It is sometimes referred to as "queer culture" or "gay culture", but the latter term can also be specific to gay men's culture.

Sexuality and gender identity-based cultures

LGBT culture varies widely by geography and the identity of the participants. Elements often identified as being common to the culture of gays, lesbians, bisexuals, and transgender people include: The work of famous gay, lesbian, bisexual and transgender people. This may include: Present-day LGBT artists and political figures; Historical figures who have been identified as LGBT. It has often been questioned whether it is appropriate to identify historical figures using modern terms for sexual identity (see History of sexuality). However, many LGBT people feel a kinship towards these people and their work, especially to the extent that it deals with same-sex attraction or gender identity. An understanding of the history of LGBT political movements. An ironic appreciation of things linked by stereotype to LGBT people. Figures and identities that are present in the LGBT community and LGBT culture, this could include the gay village, drag kings and queens, LGBT pride, and the rainbow flag.

Sexuality and gender identity-based cultures

In some cities, especially in North America, gay men and lesbians tend to live in certain neighbourhoods.

LGBT communities organize a number of events to celebrate their culture, such as Pride parades, the Gay Games and Southern Decadence.

Polyamory

Polyamory is the practice and associated culture of being romantically connected or involved with more than one person simultaneously and consensually, which is distinct yet entwined with polysexuality, the practice of having more than one sexual partner. Polyamory can occur in a social group, culture, or group of people specific to a certain gender-identity or sexual orientation. In some cultures the practice of forming multiple simultaneous romantic relationships is controversial.

Polygamy (a practice that overlaps heavily with polyamory) is the practice of legally marrying more than one person. It is against the law to marry more than one person in the United States; however, there are some countries around the world where polygamy and/or polyamorous relationships are not unusual. For example, it is not uncommon in many middle eastern cultures for men to have multiple wives. This type of polyamorous relationship is known as polygyny, whereas the opposite, in which women have multiple husbands, is called polyandry.

The illegal status of multiple marriages in many parts of the world has not stopped the formation of communities and sub-cultures that practice polyamory and informal polygamy. There are several accounts of attempted private polygamist communities in Western Europe and North America. However, these communities, for the most part, have eventually disbanded. In Western culture there are few or no examples of widespread acceptance of polyamory. This does not mean that polyamorous relationships in Western culture (and subcultures) do not exist. In the United States it is estimated that polyamory is practiced by 4-5% of the population. Polyamory exists mainly as isolated instances in which those in relationships have made agreements with their significant other(s).