The phenomenon of spermatorrhea begins to appear in boys by the age of about 14. Under normal circumstances, boys from the age of 12 years old sex organs began to develop gradually, the performance of the testicles gradually increase in size, male secondary sexual characteristics, including beard, throat knots are more and more obvious, and there is a change of voice, the production of sperm will be more and more, when sperm production to a certain amount of spermatozoa in the seminal vesicles after storage, not by way of masturbation there will be the phenomenon of seminal emission. The so-called seminal emission is that there is enough semen in the seminal vesicles to overflow when the water is full, and there will be seminal emission at night when the penis is stimulated to erection. Nowadays, many children have seminal emission at the age of 12, mainly because the diet nowadays is very good and development is faster.