A sexual minority is a group whose sexual identity, orientation or practices differ from the majority of the surrounding society. Primarily used to refer to LGBT or non-heterosexual individuals, it can also refer to transgender, genderqueer (including third gender) or intersex individuals.
Variants such as GSM ("Gender and Sexual Minorities"), GSSM ("Gender, Sexual and Sexuality Minorities") GSRM ("Gender, Sexual and Romantic Minorities"), and GSD ("Gender and Sexual Diversity") have been considered in academia, but it is SGM ("Sexual and Gender Minority") that has gained the most advancement since 2014. In 2015 the NIH announced the formation of the Sexual and Gender Minority Research Office and numerous professional and academic institutions have adopted this term.
Sexual and gender minority is an umbrella term that encompasses populations included in the acronym "LGBTI" (lesbian, gay, bisexual, transgender and intersex), and those whose sexual orientation or gender identity varies. It includes those who may not self-identify as LGBTI (e.g., queer, questioning, two-spirit, asexual, men who have sex with men, gender variant), or those who have a specific medical condition affecting reproductive development (e.g., individuals with differences or disorders of sex development, who sometimes identify as intersex).
 
Variants such as GSM ("Gender and Sexual Minorities"), GSSM ("Gender, Sexual and Sexuality Minorities") GSRM ("Gender, Sexual and Romantic Minorities"), and GSD ("Gender and Sexual Diversity") have been considered in academia, but it is SGM ("Sexual and Gender Minority") that has gained the most advancement since 2014. In 2015 the NIH announced the formation of the Sexual and Gender Minority Research Office and numerous professional and academic institutions have adopted this term.
Sexual and gender minority is an umbrella term that encompasses populations included in the acronym "LGBTI" (lesbian, gay, bisexual, transgender and intersex), and those whose sexual orientation or gender identity varies. It includes those who may not self-identify as LGBTI (e.g., queer, questioning, two-spirit, asexual, men who have sex with men, gender variant), or those who have a specific medical condition affecting reproductive development (e.g., individuals with differences or disorders of sex development, who sometimes identify as intersex).
Origins
The term sexual minority was coined most likely in the late 1960s under the influence of Lars Ullerstam's
 ground breaking book "The Erotic Minorities: A Swedish View" which came
 strongly in favor of tolerance and empathy to uncommon varieties of 
sexuality, such as paedophilia and "sex criminals". The term was used as  analogous to ethnic minority.
Scientists such as Ritch Savin-Williams support using the term in order to accurately describe adolescent youths who may not identify as any common culturally-defined sexual identity label (lesbian, gay, bisexual, et cetera) but who still have attractions towards those of the same anatomical sex as themselves.
Associated health and social issues
Stress
Social
 issues may lead to possible health and psychological issues, especially
 in youth. It has been found that sexual minorities face increased 
stress due to stigmas.
 This stigma-related stress creates elevated coping regulation and 
social and cognitive processes leading to risk for psychopathology.
Risky behavior
The
 Centers for Disease Control and Prevention published their 2015 study 
of large cohorts of ninth to twelfth grade students across the US. One 
hundred health behaviors were shown to put LGB students at risk for 
health consequences. Sexual minority students engage in more risky 
behaviors when compared with nonsexual minority students. Some students 
"...had no sexual contact [and] were excluded from analyses on sexual 
behaviors [including] female students who had sexual contact with only 
females [and] were excluded from analyses on condom use and birth 
control use..." Also excluded were "...male students who had sexual 
contact with only males [and] were excluded from analyses on birth 
control use.” 
 One small study showed that LGBT adolescents were victimized more 
often, had higher rates of psychopathology, left home more frequently, 
used highly addictive substances more frequently, and were more likely 
to have more multiple sex partners than heterosexual adolescents.
Development
Based
 on studies of adolescents, it is concluded that sexual minorities are 
similar to heterosexual adolescents in developmental needs and concerns.
 However, research has suggested that sexual minority youth (more 
specifically LGBT youth) are more susceptible to psychological and 
health issues than heterosexual youth.
Epidemiology
Sexual minorities tend to use alternative and complementary medicine alternative methods of addressing their health needs more often than heterosexuals. Sexual minority women have a higher incidence of asthma, obesity, arthritis and cardiovascular disease than other groups.
Adolescent sexual minorities report a higher incidence of the following when compared to heterosexual students:
- feelings of not being safe travelling to and from school or in school.
 - not going to school because they did not feel safe.
 - forced to do sexual things they did not want to do by someone they were dating or going out with one or more times during the 12 months (touching, kissing, or physically forced to have sexual intercourse)
 - had sexual intercourse.
 - first had sex before age 13.
 - had sex with at least four other people.
 - not using birth control.
 - had experienced sexual violence.
 
When compared to the general population, sexual minorities have a higher risk for self-injury.[22]
 The treatment of aging sexual minorities seems to be influenced more by
 ageism. Support for aging sexual minorities appears to be common.
Discrimination
When gay, lesbian, and bisexual adults reported being discriminated against, forty-two percent credited it to their sexual orientation.
 This discrimination was positively associated with both harmful effects
 on quality of life and indicators of psychiatric morbidity. 
In the media
Sexual minorities are generally portrayed in the mass media as being ignored, trivialized, or condemned. The term symbolic annihilation
 accounts for their lack of characterization due to not fitting into the
 white, heterosexual, vanilla type lifestyle. It has been suggested that
 online media has developed into a space in which sexual minorities may 
use “social artillery”. This description centers on how social 
networking and connections to oppose  instances of homophobia. Still, some individuals have made their way into the media through television and music. TV shows such as The Ellen DeGeneres Show and ABC’s Modern Family star individuals who are open about their non-heterosexual lifestyles. In music, people like Sam Smith and Sia have created songs that express their emotions
 and sexuality with a number of followers. While sexual minorities do 
have a place in the media, it is often critiqued that they are still 
limited in their representations. In shows, if a character is gay, they 
are often a very shallow character that is only present for comic relief
 or as a plot twist. Compared to a heteronormative counterpart, the 
sexual minority is often a mere side-kick. However, since the 
integration of actors, musicians, and characters of sexual minorities, 
the idea of non-normativity has become more normalized in society.
Cultural issues
Current
 and past research has been "skewed toward SM men—and is 
disproportionately focused on HIV and other sexually transmitted 
infections." Between 1989 and 2011, numerous grants for research were 
sponsored and funded by the US National Institutes of Health (NIH) but 
funded research for sexual minorities and health made up 0.1% of all 
funded studies. Most research has been directed toward gay and bisexual 
men. Women sexual minority studies accounted for only 13.5%.[27]
Sexual minorities in South Africa have sexual-orientation-related
 health inequities when compared to other countries. One of the highest 
prevalences of sexual violence directed toward women of a sexual 
minority occurs in South Africa. Women of color who are living in low 
income urban areas are notably targeted. The perpetrators of sexual 
violence believe they are "correcting the women," and their actions will
 cure them of their homosexuality.
Controversy
Some LGBT people object to using the term sexual minorities and prefer the term LGBT. Reasons for these objections may vary. For example, some LGBT people feel that the term sexual minority
 reminds them about discrimination and about being a minority. They want
 to be not a distinct minority but an integral and respectable part of 
the society. Some other LGBT people dislike the term for being too 
inclusive, including swingers,
 polyamorists, BDSM people and other perceived "sexual strangers". These
 LGBT people want to make a larger distance between these sexual 
practices and bisexuality/homosexuality/transgender. 
Some transgender and transsexual people dislike the term sexual minority
 for yet another reason. They argue that the phenomenon of 
transsexuality or transgender has nothing to do with sex, sexual 
practices or sexual orientation, but it relates to the gender,
 gender dysphoria and gender-variant behavior or feelings. Thus, they 
feel it is incorrect to classify them as "sexual minority", when, in 
fact, they are gender-variant minority. 
Some conservative groups oppose the use of the term sexual minority
 for completely different reasons. They think or feel that the term 
inherently implies some degree of legalisation or protection for those 
engaged in such sexual practices, much like ethnic minorities are 
protected from being discriminated or persecuted in modern democratic 
countries.
Some people dislike the term because it includes minority, when the fact is that not all these categories are really about minorities but actually about minorised groups.
Others referred to as "sexual minorities" include fetishists and practitioners in of BDSM (bondage, dominance, and submission), and sadism and masochism. The term may also include asexuals and people who may be strictly heterosexual and whose choice of actual sex acts may be vanilla, but whose choice of partner or partners is atypical, such as swingers (although this is debated), polyamorists or people in other nonmonogamous relationships, people who strongly prefer adolescent sex partners,  and those who have partners significantly older or younger than themselves (age disparity in sexual relationships). or people who engage in mixed race relationships.
Usually, the term sexual minority is applied only to groups who practice consensual sex: for example, it would be unusual to refer to rapists
 as a sexual minority, but the term would generally include someone 
whose sexuality gave a major, fetishized role to consensual playing out 
of a rape fantasy. Also, someone who very occasionally incorporates of consensual kink or same-sex activity into a largely vanilla, heterosexual sex life would not usually be described as a sexual minority.