The wild man syndrome also known as wild pig syndrome is a culture-bound syndrome that affects the mental health of New Guinean males in which they become hyperactive, clumsy, kleptomaniacal, and conveniently amnesic." It is known in various languages of New Guinea as "guria", "longlong", or "lulu".

"Wild-pig syndrome is a socially constructed disorder with an emotion classification of the Gururumba tribe. The illness is characterized by involuntary antisocial behavior, followed by situational amnesia and the resumption of normal life. After looting neighbors’ homes, the tribesman (usually a recently married male) ventures into the forest for several days, returning without the stolen articles. Wild-pig attacks seem to occur when a man is unable to meet his financial obligations. Those who have undergone the episodes later receive special consideration from creditors. The Gururumba people insist the illness is transmitted by the ghosts of recently deceased tribe members."

Wild pig syndrome is limited by age and sex. It only occurs in males and only men who are 25 to 35 years of age. The syndrome is treated as a disease. The behavior is an action; however, it is not acknowledged as such by society or the individual that is experiencing the condition.

The Gururumba tribe believes this syndrome is caused by being bitten by the spirit of a relative that has recently died. "They believe that this releases impulses suppressed by society and civilizations." "There are several reports from Papua New Guinea that the ingestion of various parts of plants or fungi has produced "Wild-Man" syndrome." Among these are reports of eating certain leaves, bark, certain fruit, and certain fungi There is now increasing evidence that some forms of Wild Pig Syndrome is caused by nicotine poisoning from eating green tobacco leaves. Evidence for this can be seen when comparing the physical symptoms of this condition with Wild Pig Syndrome.

Some research suggests there is a genetic basis for greed. It is possible people who have a shorter version of the ruthlessness gene (AVPR1a) may behave more selfishly.

Greed is an inordinate or insatiable longing for unneeded excess, especially for excess wealth, status, power, or food.

As secular psychological concept, greed is an inordinate desire to acquire or possess more than one needs. The degree of inordinance is related to the inability to control the reformulation of "wants" once desired "needs" are eliminated. Erich Fromm described greed as "a bottomless pit which exhausts the person in an endless effort to satisfy the need without ever reaching satisfaction." It is typically used to criticize those who seek excessive material wealth, although it may apply to the need to feel more excessively moral, social, or otherwise better than someone else.

The purpose for greed, and any actions associated with it, is possibly to deprive others of potential means (perhaps, of basic survival and comfort) or future opportunities accordingly, or to obstruct them therefrom, thus insidious and tyrannical or otherwise having negative connotation. Alternately, the purpose could be defense or counteraction from such dangerous, potential negotiation in matters of questionable agreeability. A consequence of greedy activity may be inability to sustain any of the costs or burdens associated with that which has been or is being accumulated, leading to a backfire or destruction, whether of self or more generally. So, the level of "inordinance" of greed pertains to the amount of vanity, malice or burden associated with it.

Yunnan sudden death syndrome is a label used to define unexplained cases of cardiac arrest, which afflicted significant numbers of rural villagers in Yunnan province, in southwest China. Cases occurred almost always during the midsummer rainy season (from June to August), at an altitude of . The cause turned out to be a mushroom now blamed for an estimated 400 deaths in the past three decades.

The mysterious fatalities were recorded for decades before researchers from the Chinese Center for Disease Control and Prevention isolated a significant factor common in every case: a tiny unknown mushroom which was unintentionally gathered and consumed during wild mushroom harvests in the region. Previously the syndrome was thought to be caused by Keshan disease, caused by the Coxsackie virus.

The mushroom, "Trogia venenata", is also known as 'Little White'. It has been determined that families collecting fungi to sell have been eating these Little White mushrooms as they have no commercial value. Three amino acids present in the mushrooms have been shown to be toxic. The mushrooms have also been shown to contain very high quantities of barium, and it may be that some of the deaths are simply from barium poisoning.

In the hours before death, about two-thirds of the victims had such symptoms as nausea, dizziness, heart palpitations, seizures and fatigue.

However, in December 2012 it was announced that Dr Xu Jianping (徐建平) has been collecting samples of "Trogia venenata" in Yunnan for the past three years, and his research now shows that barium levels in the wild mushroom are no higher than those of common foods such as poultry and fish. Nonetheless, it appears the mushroom will still likely play a role. Since publication of the widely circulated 2010 "Science" article, no instances of Yunnan sudden death syndrome have been reported.

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

Erotomania is a type of delusional disorder where the affected person believes that another person is in love with him or her. This belief is usually applied to someone with higher status or a famous person, but can also be applied to a complete stranger. Erotomanic delusions often occur in patients with schizophrenia and other psychotic disorders, but can also occur during a manic episode in the context of bipolar I disorder. During an erotomanic delusion, the patient believes that a secret admirer is declaring his or her affection for the patient, often by special glances, signals, telepathy, or messages through the media. Usually the patient then returns the perceived affection by means of letters, phone calls, gifts, and visits to the unwitting recipient. Even though these advances are unexpected and often unwanted, any denial of affection by the object of this delusional love is dismissed by the patient as a ploy to conceal the forbidden love from the rest of the world.

Erotomania is also called de Clérambault's syndrome, after French psychiatrist Gaëtan Gatian de Clérambault (1872–1934), who published a comprehensive review paper on the subject ("Les Psychoses Passionnelles") in 1921. Erotomania should not be confused with obsessive love or obsession with unrequited love, neither of which involves delusion.

Foerster's syndrome is the name used by Arthur Koestler in his account of the compulsive punning first described by the German neurosurgeon Otfrid Foerster.

In 1929, Foerster was operating on a patient suffering from a tumor in the third ventricle – a small cavity deep down in the phylogenetically ancient regions of the midbrain, adjacent to structures intimately concerned with the arousal of emotions. When the surgeon began to manipulate the tumor, affecting those sensitive structures, the (conscious) patient burst into a manic flight of puns. He exhibited typical sound associations, and with every word of the operator broke into a flight of ideas. The sound of one word swiftly echoed in the sound of the next, and all of the words had something to do with knives and butchery. This gruesome humour, Koestler noted, all came "from a man tied face down to the operating table with his skull open".

The core symptom of the disorder is that the sufferer holds an unshakable belief that another person is secretly in love with them. In some cases, the sufferer may believe several people at once are "secret admirers". The sufferer may also experience other types of delusions concurrently with erotomania, such as delusions of reference, wherein the perceived admirer secretly communicates his or her love by subtle methods such as body posture, arrangement of household objects, and other seemingly innocuous acts (or, if the person is a public figure, through clues in the media). Erotomanic delusions are typically found as the primary symptom of a delusional disorder or in the context of schizophrenia and may be treated with atypical antipsychotics.

Don Juanism or Don Juan syndrome is a non-clinical term for the desire, in a man, to have sex with many different female partners.

The name derives from the Don Juan of opera and fiction. The term satyriasis is sometimes used as a synonym for Don Juanism. The term has also been referred to as the male equivalent of nymphomania in women. These terms no longer apply with any accuracy as psychological or legal categories of psychological disorder.

The Dorian Gray syndrome (DGS) denotes a cultural and societal phenomenon characterized by a man's extreme pride in his personal appearance and the fitness of his physique, which is accompanied by difficulties in coping with the requirements of psychological maturation and with the aging of his body.

The DGS is characterized by a triad of symptoms that overlap, and so combine diagnostic signs of dysmorphophobia, narcissistic character traits, and the immaturity of arrested development, which often are found in paraphilias.

To preserve ephemeral youth, the man afflicted with DGS tends to consume cosmetic products and services, hair-restoration procedures, anti-impotence drugs, and cosmetic surgery; hence, he might resist the psychosomatic and psychodynamic explanations of the syndrome. The term "Dorian Gray syndrome" refers to the protagonist of the novel "The Picture of Dorian Gray" (1891), an exceptionally handsome man whose hedonism and excessive self-love proved detrimental to the personal, social, and emotional aspects of his life, and who sought to escape the ravages of time and his own decadent lifestyle by having a supernatural portrait of himself age in his place.

Coturnism is an illness featuring muscle tenderness and rhabdomyolysis (muscle cell breakdown) after consuming quail (usually common quail, "Coturnix coturnix", from which the name derives) that have fed on poisonous plants.

Protein poisoning (also referred to colloquially as rabbit starvation, mal de caribou, or fat starvation) is a rare form of acute malnutrition thought to be caused by a complete absence of fat in the diet.

Excess protein is sometimes cited as the cause of this issue; when meat and fat are consumed in the correct ratio, such as that found in pemmican (which is 50% fat by volume), the diet is considered nutritionally complete and can support humans for months or more. Other stressors, such as severe cold or a dry environment, may intensify symptoms or decrease time to onset. Symptoms include diarrhea, headache, fatigue, low blood pressure, slow heart rate, and a vague discomfort and hunger (very similar to a food craving) that can be satisfied only by the consumption of fat.

Protein poisoning was first noted as a consequence of eating rabbit meat exclusively, hence the term, "rabbit starvation". Rabbit meat is very lean; commercial rabbit meat has 50–100 g dissectable fat per 2 kg (live weight). Based on a carcass yield of 60%, rabbit meat is around 8.3% fat while beef and pork are 32% fat and lamb 28%.

Episodes of major depressive disorder and of suicidal crisis occur in the man afflicted with Dorian Gray syndrome when the defense mechanism activities, the pursuit of eternal youth, fail to indefinitely preserve his handsome face and sculpted physique; usually, anti-depressant drugs and psychotherapy are prescribed and applied to counter his feelings of failure.

Furthermore, if the man misunderstands the self-defensive character of "acting out" the DGS, and continues pursuing the timeless beauty of male youth, without being aware of the psychodynamics of narcissism, then he, as a psychiatric patient, establishes a cycle of chronic psychological depression. In extreme cases of DGS, the man seeks self-destruction, by means either of drugs or with plastic surgery, or both, in order to fill the narcissistic emptiness that is the Dorian Gray syndrome.

From case histories it is known that the toxin is stable as four-month-old pickled quail have been poisonous. Humans vary in their susceptibility; only one in four people who consumed quail soup containing the toxin fell ill. The toxin is apparently fat-soluble as potatoes fried in quail fat have proved poisonous.

Coniine from hemlock consumed by quail has been suggested as the cause, though quail resist eating hemlock. Hellebore has also been suggested as the source of the toxin. It has also been asserted that this evidence points to the seeds of the annual woundwort ("Stachys annua") being the causal agent. It has been suggested that "Galeopsis ladanum" seeds are not responsible.

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.

Intermetamorphosis is a delusional misidentification syndrome, related to agnosia. The main symptoms consist of patients believing that they can see others change into someone else in both external appearance and internal personality. The disorder is usually comorbid with neurological disorders or mental disorders.

An example from medical literature is a man who was diagnosed with Alzheimer's disease. After some time he mistook his wife for his deceased mother and later for his sister. As an explanation, he stated that he had never been married or that his wife had left him. Later he mistook his son for his brother and his daughter for another sister. Visual agnosia or prosopagnosia were not diagnosed, as the misidentification also took place during phone calls. On several occasions he mistook the hospital for the church he used to go to.

The disorder was first described in 1932 by P. Courbon and J. Tusques ("Illusions d'intermétamorphose et de la charme"), in the Journal: Annales Medico-Psychologiques issue 14, page 401-406.

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.

Given the lack of scientific data on the effects of high-protein diets, the US Food and Nutrition Board does not set a tolerable upper intake level nor upper acceptable macronutrient distribution range for protein.

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.

There has been evidence of limited, but not sustained spread of MERS-CoV from person to person, both in households as well as in health care settings like hospitals. Most transmission has occurred "in the circumstances of close contact with severely ill persons in healthcare or household settings" and there is no evidence of transmission from asymptomatic cases. Cluster sizes have ranged from 1 to 26 people, with an average of 2.7.

A study performed between 2010 and 2013, in which the incidence of MERS was evaluated in 310 dromedary camels, revealed high titers of neutralizing antibodies to MERS-CoV in the blood serum of these animals. A further study sequenced MERS-CoV from nasal swabs of dromedary camels in Saudi Arabia and found they had sequences identical to previously sequenced human isolates. Some individual camels were also found to have more than one genomic variant in their nasopharynx. There is also a report of a Saudi Arabian man who became ill seven days after applying topical medicine to the noses of several sick camels and later he and one of the camels were found to have identical strains of MERS-CoV. It is still unclear how the virus is transmitted from camels to humans. The World Health Organization advises avoiding contact with camels and to eat only fully cooked camel meat, pasteurized camel milk, and to avoid drinking camel urine. Camel urine is considered a medicine for various illnesses in the Middle East. The Saudi Ministry of Agriculture has advised people to avoid contact with camels or wear breathing masks when around them. In response "some people have refused to listen to the government's advice" and kiss their camels in defiance of their government's advice.

Psychiatrist Carl Jung believed that Don Juanism was an unconscious desire of a man to seek his mother in every woman he encountered. However, he didn't see the trait as entirely negative; Jung felt that positive aspects of Don Juanism included heroism, perseverance and strength of will.

Jung argues that related to the mother-complex "are homosexuality and Don Juanism, and sometimes also impotence. In homosexuality, the son's entire heterosexuality is tied to the mother in an unconscious form; in Don Juanism, he unconsciously seeks his mother in every woman he meets...Because of the difference in sex, a son's mother-complex does not appear in pure form. This is the reason why in every masculine mother-complex, side by side with the mother archetype, a significant role is played by the image of the man's sexual counterpart, the anima."

One of Theodore Millon's five narcissist variations is the amorous narcissist which includes histrionic features. According to Millon, the Don Juan or Casanova of our times is erotic and exhibitionistic.

The causes of premature ejaculation are unclear. Many theories have been suggested, including that PE was the result of masturbating quickly during adolescence to avoid being caught, of performance anxiety, of an unresolved Oedipal conflict, of passive-aggressiveness, and having too little sex; but there is little evidence to support any of these theories.

Several physiological mechanisms have been hypothesized to contribute to causing premature ejaculation including serotonin receptors, a genetic predisposition, elevated penile sensitivity, and nerve conduction atypicalities.

The nucleus paragigantocellularis of the brain has been identified as having involvement in ejaculatory control. Scientists have long suspected a genetic link to certain forms of premature ejaculation. In one study, 91 percent of men who have had premature ejaculation for their entire lives also had a first-relative with lifelong premature ejaculation. Other researchers have noted that men who have premature ejaculation have a faster neurological response in the pelvic muscles.

PE may be caused by prostatitis or as a drug side effect.

Premature ejaculation is a prevalent sexual dysfunction in men; however, because of the variability in time required to ejaculate and in partners' desired duration of sex, exact prevalence rates of PE are difficult to determine. In the "Sex in America" surveys (1999 and 2008), University of Chicago researchers found that between adolescence and age 59, approximately 30% of men reported having experienced PE at least once during the previous 12 months, whereas about 10 percent reported erectile dysfunction (ED). Although ED is men's most prevalent sex problem after age 60, and may be more prevalent than PE overall according to some estimates, premature ejaculation remains a significant issue that, according to the survey, affects 28 percent of men age 65–74, and 22 percent of men age 75–85. Other studies report PE prevalence ranging from 3 percent to 41 percent of men over 18, but the great majority estimate a prevalence of 20 to 30 percent—making PE a very common sex problem.

There is a common misconception that younger men are more likely to suffer premature ejaculation and that its frequency decreases with age. Prevalence studies have indicated, however, that rates of PE are constant across age groups.