In addition to celibacy, the theory cites declining numbers of marriages and declining birthrates in Japan. According to surveys conducted by the Japan Association for Sex Education, between 2011 and 2013, the number of female college students reporting to be virgins increased. Additionally, surveys conducted by the Japanese Family Planning Association (JFPA) indicated a high number of Japanese women who reported that they "were not interested in or despised sexual contact". Meanwhile, surveys conducted by the National Institute of Population and Social Security Research in Japan in 2008 and 2013, revealed that the number of Japanese men and women reporting to not be in any kind of romantic relationship grew by 10%.

The theory attributes two possible causes for these reports: the past two decades of economic stagnation as well as high gender inequality in Japan.

Republican marriage () was a method of execution that allegedly occurred in Nantes during the Reign of Terror in Revolutionary France and "involved tying a naked man and woman together and drowning them". This was reported to have been practised during the drownings at Nantes ("noyades") that were ordered by local Jacobin representative-on-mission Jean-Baptiste Carrier between November 1793 and January 1794 in the city of Nantes. Most accounts indicate that the victims were drowned in the Loire River, although a few sources describe an alternative means of execution in which the bound couple is run through with a sword, either before, or instead of drowning.

The earliest reports of such "marriages" date from 1794, when Carrier was tried for his crimes, and they were soon cited by contemporary counter-revolutionary authors such as Louis-Marie Prudhomme and Louis Gabriel Ambroise de Bonald.

Homophobia in ethnic minority communities refers to any negative prejudice or form of discrimination within the ethnic minority communities worldwide towards people who identify as – or are perceived as being – lesbian, gay, bisexual or transgender (LGBT), known as homophobia. This may be expressed as antipathy, contempt, prejudice, aversion, hatred, irrational fear, and is sometimes related to religious beliefs. While religion can have a positive function in many LGB Black and Minority Ethnic (BME) communities, it can also play a role in supporting homophobia.

Many LGBT ethnic minority persons rely on members of their ethnic group for support in terms of racial matters. However, within these communities, homophobia and transphobia often exists within the context of ethnocultural norms on gender and sexual orientation, with one American researcher claiming that "a common fallacy within communities of color is that gay men or lesbians are perceived as 'defective' men or women who want to be a member of the opposite gender". There is a lot of difficulty regarding how to categorise homosexuality throughout different cultures, In recent times, scholars have argued that Western notions of a gay and/or heterosexual identity only began to emerge in Europe in the mid to late 19th century. Behaviors that today would be widely regarded as homosexual, at least in the West, enjoyed a degree of acceptance in around three quarters of the cultures surveyed in "Patterns of Sexual Behavior" (1951).

Celibacy syndrome (, "sekkusu shinai shōkōgun") is a media hypothesis proposing that a growing number of Japanese adults have lost interest in sexual activity and have also lost interest in romantic love, dating and marriage. The theory has been reported by unknown members of "Japan's media" according to journalist Abigail Haworth of "the Guardian". Following the report, the theory gained widespread attention in English media outlets in 2013, and was subsequently refuted by several journalists and bloggers.

Uniform fetishism is a sexual fetishism where an individual is sexually aroused by uniforms.

Islamophobia is an intense fear or hatred of, or prejudice against, the Islamic religion or Muslims, especially when seen as a geopolitical force or the source of terrorism.

The term was first used in the early 20th century and it emerged as a neologism in the 1970s, then it became increasingly salient during the 1980s and 1990s, and it reached public policy prominence with the report by the Runnymede Trust's Commission on British Muslims and Islamophobia (CBMI) entitled "Islamophobia: A Challenge for Us All" (1997). The introduction of the term was justified by the report's assessment that "anti-Muslim prejudice has grown so considerably and so rapidly in recent years that a new item in the vocabulary is needed".

The causes and characteristics of Islamophobia are still debated. Some commentators have posited an increase in Islamophobia resulting from the September 11 attacks, some from multiple terror attacks in Europe and the United States, while others have associated it with the increased presence of Muslims in the United States and in the European Union. Some people also question the validity of the term. The academics S. Sayyid and Abdoolkarim Vakil maintain that Islamophobia is a response to the emergence of a distinct Muslim public identity globally, the presence of Muslims is in itself not an indicator of the degree of Islamophobia in a society. Sayyid and Vakil maintain that there are societies where virtually no Muslims live but many institutionalized forms of Islamophobia still exist in them.

Islamophobia in the United States can be described as the unvalidated, highly speculative, affective distrust and hostility towards Muslims, Islam, and those perceived as following the religion and or appear as members of the religion and its associative groups. This social aversion and bias is facilitated and perpetuated by violent and uncivilized stereotypes portrayed in various forms of American media networks and political platforms that result in the marginalization, discrimination, and exclusion of the Muslims and Muslim perceived individuals. Media and politicians capitalize on public fear and distrust of Muslims through laws that specifically target Muslims, while the media emphasizes Muslim religious extremism in association with violent activity.

Advocacy groups like Center for American Progress explain that this social phenomenon is not new, but rather, has increased it’s presence in American social and political discourse over the past ten to fifteen years. They cite that several organizations donate large amounts of money to create the “Islamophobia megaphone”. CAP defines the megaphone analogy as “a tight network of anti- Muslim, anti- Islam foundations, misinformation experts, validators, grass root organizations, religious rights groups and their allies in the media and in politics” who work together to misrepresent Islam and Muslims in the United States. As a result of this network, Islam is now one of the most stigmatized religions, with only 37 percent of Americans having a favorable opinion of Islam, according to a 2010 ABC News/ Washington Post poll. This biased perception of Islam and Muslims manifests itself into the discrimination of racially perceived Muslims in the law and media, and is conceptually reinforced by the Islamophobia Network.

Anti-Arabism, Anti-Arab sentiment or Arabophobia is opposition to, or dislike, fear, hatred, and advocacy of genocide of Arab people.

Historically, anti-Arab prejudice has been suggested by such events as the reconquest of the Iberian Peninsula, the condemnation of Arabs in Spain by the Spanish Inquisition, the Zanzibar Revolution in 1964, and the 2005 Cronulla riots in Australia. In the current era, racial prejudice against Arabs is apparent in many countries including Iran, Poland, France, Australia, Israel, and the United States (including Hollywood). Various advocacy organizations have been formed to protect the civil rights of Arab citizens in the United States, such as the American-Arab Anti-Discrimination Committee (ADC) and the Council on American-Islamic Relations (CAIR).

Anti-Chinese sentiment in the United States has existed since the late 18th century. Its origins have been traced to the American merchants, missionaries, and diplomats who sent home from China "relentlessly negative" reports of the people they encountered there. These attitudes were transmitted to Americans who never left North America, triggering talk of the Yellow Peril, and continued through the Cold War during McCarthyism. Modern anti-Chinese sentiment is the result of China's rise as a major world power. Anti-Chinese sentiment or sinophobia is a broad opposition or hostility to the people, policies, culture, or politics of China.

Some types of BDSM play include, but are not limited to:

- Animal roleplay

- Bondage

- Breast torture

- Cock and ball torture (CBT)

- Erotic electrostimulation

- Edgeplay

- Flogging

- Golden showers (urinating)

- Human furniture

- Japanese bondage

- Medical play

- Paraphilic infantilism

- Predicament bondage

- Pussy torture

- Sexual roleplay

- Spanking

- Suspension

- Torture

- Tickle torture

- Wax play

Homophobia encompasses a range of negative attitudes and feelings toward homosexuality or people who are identified or perceived as being lesbian, gay, bisexual or transgender (LGBT). It has been defined as contempt, prejudice, aversion, hatred or antipathy, may be based on irrational fear, and is often related to religious beliefs.

Homophobia is observable in critical and hostile behavior such as discrimination and violence on the basis of sexual orientations that are non-heterosexual. Recognized types of homophobia include "institutionalized" homophobia, e.g. religious homophobia and state-sponsored homophobia, and "internalized" homophobia, experienced by people who have same-sex attractions, regardless of how they identify.

Negative attitudes toward identifiable LGBT groups have similar yet specific names: lesbophobia is the intersection of homophobia and sexism directed against lesbians, biphobia targets bisexuality and bisexual people, and transphobia targets transgender and transsexual people and gender variance or gender role nonconformity. According to 2010 Hate Crimes Statistics released by the FBI National Press Office, 19.3 percent of hate crimes across the United States "were motivated by a sexual orientation bias." Moreover, in a Southern Poverty Law Center 2010 "Intelligence Report" extrapolating data from fourteen years (1995–2008), which had complete data available at the time, of the FBI's national hate crime statistics found that LGBT people were "far more likely than any other minority group in the United States to be victimized by violent hate crime."

The term "homophobia" and its usage have been criticized by several sources as unwarrantedly pejorative

Poena cullei (from Latin 'penalty of the sack') under Roman law was a type of death penalty imposed on a subject who had been found guilty of parricide. The punishment consisted of being sewn up in a leather sack, sometimes with an assortment of live animals, and then being thrown into water. The punishment may have varied widely in its frequency and precise form during the Roman period. For example, the earliest fully documented case is from ca. 100 BCE, although scholars think the punishment may have developed about a century earlier (earlier than that, murderers, including parricides, would be handed over to the aggrieved family for punishment, rather than punishment being enacted by Roman state officials). Inclusion of live animals in the sack is only documented from Early Imperial times, and at the beginning, only snakes are mentioned. At the time of Emperor Hadrian (2nd century CE), the most well known form of the punishment was documented, where a cock, a dog, a monkey and a viper were inserted in the sack. However, at the time of Hadrian "poena cullei" was made into an optional form of punishment for parricides (the alternate being thrown to the beasts in the arena). During the 3rd century CE up to the accession of Emperor Constantine, "poena cullei" fell out of use; Constantine revived it, now with only serpents to be added in the sack. Well over 200 years later, Emperor Justinian reinstituted the punishment with the four animals, and "poena cullei" remained the statutory penalty for parricides within Byzantine law for the next 400 years, when it was replaced with the punishment for parricides to be burnt alive instead.

"Poena cullei" gained a revival of sorts in late medieval and early modern Germany, with late cases of being drowned in a sack along with live animals being documented from Saxony in the first half of the 18th century.

Xenophobia is the fear and distrust of that which is perceived to be foreign or strange. Xenophobia can manifest itself in many ways involving the relations and perceptions of an ingroup towards an outgroup, including a fear of losing identity, suspicion of its activities, aggression, and desire to eliminate its presence to secure a presumed purity. Xenophobia is a political term and not a recognized medical phobia.

Xenophobia can also be exhibited in the form of an "uncritical exaltation of another culture" in which a culture is ascribed "an unreal, stereotyped and exotic quality". The terms xenophobia and racism are sometimes confused and used interchangeably because people who share a national origin may also belong to the same race. Due to this, xenophobia is usually distinguished by opposition to foreign culture.

Transsexual people experience a gender identity that is inconsistent with, or not culturally associated with, their assigned sex, and desire to permanently transition to the gender with which they identify, usually seeking medical assistance (including hormone replacement therapy and other sex reassignment therapies) to help them align their body with their identified sex or gender.

"Transsexual" is generally considered a subset of "transgender", but some transsexual people reject the label of "transgender". A medical diagnosis of gender dysphoria can be made if a person expresses a desire to live and be accepted as a member of their identified sex, and if a person experiences impaired functioning or distress as a result of their gender identity.

In 2009 Amy Marsh, a clinical sexologist, surveyed the twenty-one English-speaking members of Erika Eiffel's 40-strong OS Internationale about their experiences. About half reported autism spectrum disorders: six had been diagnosed, four were affected but not diagnosed, and three of the remaining nine reported having "some traits." According to Marsh, "The emotions and experiences reported by OS people correspond to general definitions of sexual orientation," such as that in an APA article "on sexual orientation and homosexuality ... [which] refers to sexual orientation as involving 'feelings and self concept.'"

Estimates of the prevalence of transgender people are highly dependent on the specific case definitions used in the studies, with prevalence rates varying by orders of magnitude. The most frequently quoted estimate of prevalence is from the Amsterdam Gender Dysphoria Clinic; over four decades the clinic has treated roughly 95% of Dutch transsexual clients, and it suggests a prevalence of 1:10,000 among assigned males and 1:30,000 among assigned females. In the US, the DSM-IV (1994) says that roughly 1 in 30,000 assigned males and 1 in 100,000 assigned females seek sex reassignment surgery. Though no direct studies on the prevalence of GID have been done, a variety of clinical papers published in the past 20 years provide estimates ranging from 1:7,400 to 1:42,000 in assigned males and 1:30,040 to 1:104,000 in assigned females. A 2008 study of the number of New Zealand passport holders who changed the sex on their passport estimated that 1:3,639 birth-assigned males and 1:22,714 birth-assigned females were transsexual.

The most recent (2016) systematic review of prevalence, leading to a meta-analysis of 27 studies, found estimates per 100,000 population of 9.2 (95% CI = 4.9–13.6) for surgical or hormonal gender affirmation therapy and 6.8 (95% CI = 4.6–9.1) for transgender-related diagnoses. Of studies assessing self-reported transgender identity, prevalence was 871 (95% CI = 519–1,224); however, this result was influenced by a single outlier study. After removal of that study, the figure dropped to 355 (95% CI = 144–566). Significant heterogeneity was observed in most analyses.

Olyslager and Conway presented a paper at the WPATH 20th International Symposium (2007) arguing that the data from their own and other studies actually imply much higher prevalence, with minimum lower bounds of 1:4,500 male-to-female transsexual people and 1:8,000 female-to-male transsexual people for a number of countries worldwide. They estimate the number of post-op women in the US to be 32,000 and obtain a figure of 1:2500 male-to-female transsexual people. They further compare the annual incidences of SRS and male birth in the U.S. to obtain a figure of 1:1000 MTF transsexual people and suggest a prevalence of 1:500 extrapolated from the rising rates of SRS in the US and a "common sense" estimate of the number of undiagnosed transsexual people. Olyslager and Conway also argue that the US population of assigned males having already undergone reassignment surgery by the top three US SRS surgeons alone is enough to account for the entire transsexual population implied by the 1:10,000 prevalence number, yet this excludes all other US SRS surgeons, surgeons in countries such as Thailand, Canada, and others, and the high proportion of transsexual people who have not yet sought treatment, suggesting that a prevalence of 1:10,000 is too low.

A study of Swedes estimated a ratio of 1.4:1 trans women to trans men for those requesting sex reassignment surgery and a ratio of 1:1 for those who proceeded.

A presentation at the LGBT Health Summit in Bristol, UK, based upon figures from a number of reputable European and UK sources, shows that this population is increasing rapidly (14% per year) and that the mean age of transition is actually rising.

In 2015, the National Center for Transgender Equality conducted a National Transgender Discrimination Survey. Of the 27,715 transgender and non-binary people who took the survey, 35% identified as non-binary, 33% identified as transgender women, 29% identified as transgender men, and 3% said that "crossdresser" best described their gender identity.

Among the most common uniforms in uniform fetish are those of a police officer, prison officer, soldier, schoolgirl, nurse, French maid, waitress, cheerleader, and Playboy Bunny. Some people also regard nuns' habits or even aprons as uniforms. The uniforms may be genuine, realistic, or they may be sexualized through the use of a very short miniskirt, a very long hobble skirt or a corset, through the use of stockings, fishnet tights, or high heels, or by being made of leather or latex, according to preference. Sometimes uniforms are used according to what activity is being done. For example, someone may wear a nurse's uniform to administer an enema or a police uniform to handcuff and cage someone. Two people may dress as inmates for cell mate-on-cell mate activities in a prison setting or as a submissive to a third (prison guard) roleplayer. This may add a sense of authenticity to the game play. A stripper dressed as a police officer is a popular fixture at birthday and bachelor parties. The "officer" begins with a mock "arrest", often using handcuffs, of the guest of honor before going into a dance routine.

Object sexuality or objectophilia is a form of sexuality focused on particular inanimate objects. Those individuals with this expressed preference may feel strong feelings of attraction, love, and commitment to certain items or structures of their fixation. For some, sexual or even close emotional relationships with humans are incomprehensible. Some object-sexual individuals also often believe in animism, and sense reciprocation based on the belief that objects have souls, intelligence, and feelings, and are able to communicate.

Foot binding was the custom of applying tight binding to the feet of young girls to modify the shape of their feet. The practice possibly originated among upper class court dancers during the Five Dynasties and Ten Kingdoms period in 10th century China, then became popular among the elite during the Song dynasty and eventually spread to all social classes by the Qing dynasty. Foot binding became popular as a means of displaying status (women from wealthy families, who did not need their feet to work, could afford to have them bound) and was correspondingly adopted as a symbol of beauty in Chinese culture. Foot binding limited the mobility of women, resulting in them walking in a swaying unsteady gait, although some women with bound feet working outdoor had also been reported. The prevalence and practice of foot binding varied in different parts of the country. Feet altered by binding were called lotus feet.

It has been estimated that by the 19th century, 40–50% of all Chinese women may have had bound feet, and up to almost 100% among upper class Han Chinese women. The Manchu Kangxi Emperor tried to ban foot binding in 1664 but failed. In the later part of the 19th century, Chinese reformers challenged the practice but it was not until the early 20th century that foot binding began to die out as a result of anti-foot-binding campaigns. Foot-binding resulted in lifelong disabilities for most of its subjects, and a few elderly Chinese women still survive today with disabilities related to their bound feet.

Transvestism is the practice of dressing and acting in a style or manner traditionally associated with the opposite sex. In some cultures, transvestism is practiced for religious, traditional or ceremonial reasons.

The phenomenon known as Beatlemania originated in the United Kingdom, birthplace of the Beatles, when the band first realised enormous popularity there in 1963. Returning in 1962 from a highly formative two-year residency in Germany, the Beatles achieved a commercial breakthrough with their second UK single release, "Please Please Me" early in 1963, but gained "Superstar" status with the release of "She Loves You" later that year. There followed an almost non-stop series of concerts and tours, attended with feverish enthusiasm across the UK, for the whole of the following year. The Beatles' popularity in the UK came to exceed even that of the notable American artists Tommy Roe, Chris Montez and Roy Orbison, whose UK chart success at the time did not keep them from being overshadowed by the Beatles during their 1963 nationwide tours with the lower-billed band — an achievement previously unknown for a UK act.

With intense media interest in the Beatles during 1963, the year was also taken up with TV shows, press interviews and a weekly radio show. Despite these demands the band found time for many sessions in the recording studio, releasing two albums and four singles during the year. 1963 was also the year when Lennon's son Julian was born.

By the end of 1963, Beatlemania would begin to spread internationally. The single "I Want to Hold Your Hand" entered the US charts on 18 January 1964, selling one-and-a-half million copies in under three weeks, and the following month the Beatles made their first visit to America. The great interest in the Beatles brought about a major change in US attitudes to popular music and marked the start of the phenomenon known as the British Invasion.

Anorexia mirabilis literally means "miraculous lack of appetite". It refers almost exclusively to women and girls of the Middle Ages who would starve themselves, sometimes to the point of death, in the name of God. The phenomenon is also known by the name inedia prodigiosa ("prodigious fasting").

Attitudes towards a person's sexual orientation vary throughout the United States, and the social and cultural mores surrounding sexuality have a large sociological impact on how individuals behave, especially with regard to the family unit. Many ethnic minority families in the United States do not feel comfortable discussing matters of sexuality, and disclosure of one's sexual orientation or identity often presents challenges, and many feel that their coming out process may force them to be loyal to one community over another.

In the United States, 44% of LGBT students of colour have reported experiencing bullying based on their sexual orientation and/or race; 13% reported physical harassment and 7% reported physical assault due to the same reasons.

Gerontophilia is the sexual preference for the elderly. A person with such a sexual preference is a gerontophile. The word "gerontophilia" was coined in 1901 by Richard von Krafft-Ebing. It derives from Greek: geron, meaning "old man or woman" and philie, meaning "love". Gerontophilia is classified as a paraphilia, but is not mentioned in the "Diagnostic and Statistical Manual of Mental Disorders" or International Classification of Diseases.

The prevalence of gerontophilia is unknown. A study of pornographic search terms on a peer-to-peer network reported that 0.15% had gerontophilic themes. Sex offenders with elderly victims do not necessarily have gerontophilia. There are other possible motivations for these offenses, such as rage or sadism, or the increased vulnerability of elderly as a social group, which are factors that may not involve a sexual preference for the elderly. There are no studies showing that most such offenders are gerontophiles. In one small study, two of six sex offenders against the elderly evinced gerontophilic tendencies. Gerontophilia can also be expressed with consenting elderly partners in a legal context.

Research on gerontophilia is limited to a small number of case studies, beginning with a paper by French physician Charles Féré in 1905. Féré described a 27-year-old man who rejected an arranged marriage with a 20-year-old "beauty" in favor of a 62-year-old woman. Such studies commonly report that the subject had an early sexual experience with a much older woman.

Anti-Catholicism (also referred to as Catholicophobia or Catholico- phobia) is hostility towards Catholics or opposition to the Catholic Church, its clergy and its adherents.

After the Protestant Reformation and until at least the late 20th Century, the majority of Protestant states (especially the United Kingdom and the United States) made anti-Catholicism and opposition to the Pope and Catholic rituals major political themes, with anti-Catholic sentiment at times leading to violence and religious discrimination against Catholic individuals (often derogatorily referred to in Anglophone Protestant countries as "papists" or "Romanists"). Historically, Catholics in Protestant countries were frequently suspected of conspiring against the state in furtherance of papal interests or to establish a political hegemony under the "Papacy", with Protestants sometimes questioning Catholic individuals' loyalty to the state and suspecting Catholics of ultimately maintaining loyalty to the Vatican rather than maintaining loyalty to their domiciled countries. In majority Protestant countries with large scale immigration, such as the United States and Australia, suspicion or discrimination of Catholic immigrants often overlapped or conflated with nativism, xenophobia, and ethnocentric or racist sentiments (i.e. anti-Italianism, anti-Irish sentiment, Hispanophobia, anti-Quebec sentiment, anti-Polish sentiment).

In the Early modern period, in the face of rising secular powers in Europe, the Catholic Church struggled to maintain its traditional religious and political role in primarily Catholic nations. As a result of these struggles, there arose in some majority Catholic countries a hostile attitude towards the considerable political, social, spiritual and religious power of the Pope and the clergy in the form of anti-clericalism.