Under normal circumstances, the number of branches of sensitive nerves in the penis should be 3-5, but patients with primary refractory premature ejaculation have as many as 8-9 branches, and some individuals even have 13 branches that are too many and too dense. It is distributed in the coronal sulcus of the glans penis, resulting in high sensitivity to sexual stimulation. Once it enters the vagina or even just touches the vaginal opening, there will be an explosive and rapid ejaculation phenomenon, that is, severe premature ejaculation. "Song's Desensitization Premature Ejaculation Treatment" is to first accurately locate the sensitive nerves distributed in the coronal groove of the glans penis and the penis under a microscope, and based on the specific distribution of the sensitive nerves in the penis and the degree of premature ejaculation of each patient, the penis is The sensitive nerve blocking knife selectively blocks the sensitive nerves of the penis and reduces the number of sensitive nerves, thereby reducing the sensitivity of the penis and improving the tolerance of the glans, thereby achieving the purpose of delaying ejaculation and curing premature ejaculation.