Psychosexual disorders are a group of psychiatric disorders characterized by significant psychological and behavioral deviations from normal sexual behavior, with such deviations as the primary or only means of sexual arousal and satisfaction. Psychosexual disorders include many categories, such as fetishism, cross-dressing disorder, voyeurism, friction disorder, sadism and masochism, and mixed sexual preference disorder. In previous medical books these disorders were also referred to as fetishes, such as fetishism, transvestism or voyeurism. Clinically, psychosexual disorders are classified into the following 3 types: 1. Sexual identity disorder: It is mainly manifested by the abnormal identification of one’s sexual identity, psychologically denying one’s gender, and male patients will desire to dress like women or want to turn into women. This psychological disorder is actually a kind of transsexualism, also known as heterosexual conversion disorder, transsexual disease, etc. Transsexualism, most of these patients are related to their childhood upbringing, such as growing up like to wear the sisters’ clothes, and the sisters did not stop, or even jokingly encouraged to continue to wear, the patient may gradually become interested in female life, to the idea of sex change. 2, sexual orientation disorder: from the patient’s own sexual orientation and sexual development disorders, patients are often depressed, pain, anxiety, such as bisexuality, homosexuality, pedophilia, etc.. Pedophilia, these patients are mostly middle-aged and older men, and suffer from sexual dysfunction in the majority. They mostly target children of relatives, friends and neighbors, using various means to lure children by throwing money or food, etc., to peep and play with children’s genitals (whether boys or girls) to achieve sexual satisfaction, which can seriously cause genital damage to children. 3, sexual preference disorder: this type of patients in sexual satisfaction is completely different from normal people, will be long-term use of a variety or only a different behavior to meet their sexual needs, such as friction, exhibitionism, fetish, transvestism, sexual sadism and masochism, etc.. Fetishism, which is mostly male, produces sexual arousal and dependence on objects of the opposite sex, and the objects fetishized are all directly close to the female body, especially items of the sexual organ area, such as corsets, panties, sanitary napkins, socks, etc. The patient is sexually aroused by touching, smelling, licking, and fantasizing about these objects and masturbating at the same time, or by holding the object during sexual intercourse by herself or by asking the sexual partner to hold it. Pornophilia, in which the patient exposes his or her genitals to the opposite sex in order to generate sexual arousal and sexual satisfaction, is almost exclusively seen in men. The distinctive clinical feature of exhibitionism is that the more distressed and stressful the patient’s life is, the more likely it is to occur. They are unable to control exhibitionism even though they know that the behavior is against the law and that being caught can have serious consequences. Friction is an act of sexual arousal that occurs when a person rubs certain parts of his body directly against the body of someone he does not know in a public place. Most commonly, men rub their penises against women’s buttocks, which can cause ejaculation in severe cases. They will often do this in the summer when they are less clothed, in places where they have reasonable access to women’s bodies, such as in cars or in ticket lines. Most patients with friction disorder are able to recognize the illegality of this behavior and have tried to repent, but are often unable to extricate themselves. References: [1] Geng Yaoguo, Su Linyan, et al. Psychosexual disorders[J]. Chinese Journal of Practical Pediatrics,2007,22(3):178-180. [2]Zhuang J. Analysis of common and rare psychosexual disorders in male outpatient clinics and countermeasures to solve them[J]. China Sex Science,2014(11): 111-112. [3]Tao Lin. Sexual preference disorder[J]. Chinese Journal of Family Planning,2014,22(11):786-788.