. Fetishism and paraphilias in general usually becomes evident during puberty, but may develop prior to that. Different paraphilias may have different causes, and there is no guarantee that two persons with the same paraphilias as the other would be interested in the same aspects of it or have the same ultimate cause for its development. From a
personality perspective, fetishists in studies generally report higher levels of
introversion, impersonal sexual activity such as
masturbation and less satisfaction with life and relationships.
Hypersexual behavior increased the
odds ratio for some fetishes and paraphilias, with a ratio of 4.6 in males and 25.6 in females, according to a 1996 Swedish study. Some explanations invoke
classical conditioning. In several experiments, men have been conditioned to show arousal to stimuli like boots, geometric shapes or penny jars by pairing these cues with conventional erotica. According to
John Bancroft, conditioning alone cannot explain fetishism, because it does not result in fetishism for most people. He suggests that conditioning combines with some other factor, such as an abnormality in the sexual learning process.
Social learning theories which combine
social cognition and
operant conditioning have also been proposed as an explanation for how fetishes may be learned, with the hypothesis being that fetishism is induced by the brain mistaking the object of arousal as a culturally appropriate source of sexual desire due to the unique experiences of the fetishist. Men who report being sexually rejected often are more likely to develop
partialism and fetishism towards other objects such as
undergarments, which is believed to be a reaction where the person learns over time to value the non-human parts of potential partners as a social response. Theories of
sexual imprinting propose that humans learn to recognize sexually desirable features and activities during childhood. Fetishism could result when a child is imprinted with an overly narrow or incorrect concept of a sex object. Imprinting seems to occur during the child's earliest experiences with arousal and desire, and is based on "an egocentric evaluation of salient reward- or pleasure-related characteristics that differ from one individual to another." This has been disputed by a meta-analysis and experiment done by a 2013 study, showing a lack of correlation between foot stimulation, other stimulation to areas, and erotic behavior, though it did not explicitly rule in or out the potential of another brain area responsible for eroticism. The study concluded that neurological mechanisms regarding fetishism are poorly understood.
Temporal lobe injuries and epilepsy have been linked to subsequent development of paraphilia in rare cases. In one case, an
anterior temporal lobectomy relieved an epileptic man's fetish for safety pins. Various explanations have been put forth for the rarity of female fetishists. Most fetishes are visual in nature, and males are thought to be more sexually sensitive to visual stimuli.
Roy Baumeister suggests that male sexuality is unchangeable, except for a brief period in childhood during which fetishism could become established, while
female sexuality is fluid throughout life. == Diagnosis ==