not result in a charge or conviction (including aggressive behavior and stalking) Medical history: organic causes which may be responsible for the morbid jealousy (i.e. Parkinson's) Forms Obsessions: the individual's own thoughts are egodystonic; they are acknowledged to be senseless, and usually resisted. Jealous thoughts are experienced as intrusive and excessive, and compulsive behavior such as checking up on their partner may follow. Egodystonicity (the distress caused by thoughts that are unwanted and viewed as contrary to conscious wishes) generally varies a large amount between patients and “a continuum from obsessional to delusional, which morbid jealousy has been suggested” (Insel & Akiskal 1986). Extreme obsessions: much time is taken up by jealous concerns, and there is a great difficulty in putting the concerns out of the mind. Impairment of the relationship, limitation of the partner's freedom and checking on the partner's behavior may occur. Although a distinction was occasionally difficult to make, the categories of ‘psychotic’ (delusional) and ‘neurotic’ jealousy contained similar proportions (each between one-third and one-half). Delusions: the individual's own thoughts are egosyntonic; they are regarded as true, and not resisted. Some authors compare morbid jealousy to a delusional state (e.g. Enoch & Trethowan, 1979). Beliefs may include the morbidly jealous subjects' suspicion that: 1. he or she is being poisoned or given some substance(s) to decrease sexual potency by the partner, 2. that the partner has contracted a sexually transmitted disease from a third party 3. is engaging in sexual intercourse with a third party while the subject sleeps. Causes Psychological There are many psychological causes that go along with morbid jealousy. Some people equate morbid jealousy with a delusional state. “Delusions of infidelity exist without any other psychopathology and may be considered to be morbid jealousy in its ‘purest’ form” (Kingham and Gordon). For morbid jealousy to occur one's memories are subconsciously changed and their partner's actions are misinterpreted as well to the extent that the person is absolutely convinced of betrayal from the partner. It is thought that even some brain disorders might eventually lead to delusions of betrayal. It has also been recorded by Cobb (1979) “that morbid jealousy may be present with all types of cerebral insult or injury.” "It has been suggested that morbid jealousy may potentially arise in response to reduced sexual function”. Cobb (1979) drew attention to the elderly man whose waning sexual powers were insufficient to satisfy a younger