What is the reason for men's sperm?

Men's factors are more, generally there are the following factors: one, mental factors, due to excessive sexual requirements, can not be restrained, especially in sleep before thinking about sexual excitement, long-term sexual activity of the central nervous system is stimulated and caused by sperm; Second, weak constitution, the function of various organs is not perfect, such as cerebral cortex function is not complete, loss of control of the lower sexual center, and erection center and ejaculation center excitability enhancement, will also occur sperm; Third, local lesions. Such as phimosis, foreskin is too long, urethritis, prostatitis, etc., these lesions can also stimulate sexual organs and produce synovial sperm.