The term paraphilia did not exist in the DSM-II, and diagnoses did not have specific criteria until DSM-III. Sadistic personality disorder does not actually refer to any sexual interest, and instead refers to the pervasive disregard for the well-being of others. It is usually associated with a history of violence and criminality (which can include, but is not limited to sexual crimes). Features
With paraphilic coercive disorder, the individual employs enough force to subdue a victim, but with sexual sadism disorder, the individual often continues to inflict harm regardless of the compliance of the victim, which sometimes escalates not only to the death of the victim, but also to the mutilation of the body. What is experienced by the sadist as sexual does not always appear obviously sexual to non-sadists: sadistic rapes do not necessarily include penile penetration of the victim. In a survey of offenses, 77% of cases included sexual bondage, 73% included anal rape, 60% included blunt force trauma, 57% included vaginal rape, and 40% included penetration of the victim by a foreign object. In 40% of cases, the offender kept a personal item of the victim as a souvenir.On personality testing, sadistic rapists apprehended by law enforcement have shown elevated traits of impulsivity, hypersexuality, callousness, and psychopathy.Although there appears to be a continuum of severity from mild (hyperdominance or BDSM) to moderate (paraphilic coercive disorder) to severe (sexual sadism disorder), it is not clear if they are genuinely related or only appear related superficially.Very little is known about how sexual sadism disorder develops.
A stimulated saliva flow rate less than 0.5 ml per gland in 5 minutes or less than 1 ml per gland in 10 minutes is decreased. The term subjective xerostomia is sometimes used to describe the symptom in the absence of any clinical evidence of dryness. Xerostomia may also result from a change in composition of saliva (from serous to mucous). Salivary gland dysfunction is an umbrella term for the presence of xerostomia, salivary gland hyposalivation, and hypersalivation. Signs and symptoms
Hyposalivation may give the following signs and symptoms:

Dental caries (xerostomia related caries) – Without the buffering effects of saliva, tooth decay becomes a common feature and may progress much more aggressively than it would otherwise ("rampant caries"). It may affect tooth surfaces that are normally spared, e.g., cervical caries and root surface caries. This is often seen in patients who have had radiotherapy involving the major salivary glands, termed radiation-induced caries. Therefore, it is important that any products used in managing dry mouth symptoms are sugar-free, as the presence of sugars in the mouth support the growth of oral bacteria, resulting in acid production and development of dental caries. Acid erosion. Saliva acts as a buffer and helps to prevent demineralization of teeth. Oral candidiasis – A loss of the antimicrobial actions of saliva may also lead to opportunistic infection with Candida species. Ascending (suppurative) sialadenitis – an infection of the major salivary glands (usually the parotid gland) that may be recurrent.