Psychologists believe that any activity in which friction is used to obtain pleasure in the sexual organs falls within the scope of masturbation, and that masturbation activities are not limited to parts of the sexual organs. So at what age does masturbation begin to occur in children? According to the survey, the average age is 2.8 years old, and there is not much difference between boys and girls, some children are younger. The ways of expression are: rubbing and stroking the genitals, pinching the legs, etc. There are two stages in the development of masturbation in children. The first stage belongs to the exploration period, where most children masturbate before the age of 3 years old more like an exploration of body sensations, and the masturbation behavior is casual and not aimed at obtaining sexual excitement. Young children unintentionally touch or fondle their sexual organs and feel stimulation that they have never felt before, so they explore and repeat the behavior to give themselves pleasure. The second stage of masturbation is aimed at obtaining pleasure, and the masturbation style tends to mature. The act of masturbation stops and resurfaces over a period of time, recurring and sometimes strong and sometimes weak. Psychologists believe that the main harm of masturbation is not due to masturbation itself, but to social attitudes toward masturbation and the reaction such attitudes cause in the psyche of a neurosensitive person. Sexual impulses are a natural law and are not subject to human will. The negative attitude of parents and teachers can cause a child to struggle internally, and the trauma of a failed struggle is the real evil of masturbation. Modern sexual medicine believes that frank and enjoyable masturbation is absolutely harmless to health. Most parents and teachers of young children subconsciously have a negative attitude toward masturbation, hoping that guidance, intimidation, or even punishment will make their children stop masturbating and change this shameful habit. But parents and teachers don’t understand that making children feel that masturbation is a dishonorable thing, something to be ashamed of, and the anxiety that comes when they can’t control it again, is what is really bad for their health. So what should we do? 1, parents and teachers should know the science of masturbation for children and change the misconceptions about masturbation. 2, to help children know and abide by the boundaries of sexual activity, especially children over 3 years old, to know to avoid others, not in public places, and if the child insists on being in public places, then take the child away. 3.Do not shame, blame, intimidate, threaten and scold the child. 4. Do not forcibly interrupt the child’s ongoing masturbation. 5.Educate your child about sexual safety and don’t let your child hurt his or her genitals. 6.Parents and teachers communicate with each other in a timely manner to prevent their children from being hurt in kindergarten. 7. Help children who indulge in masturbation. For children who masturbate too often, change the child’s bad environment, participate in more normal social interactions, and improve the child’s spiritual quality. Seek professional help if necessary.