Ejaculation is a neural reflex, a delayed unconditioned reflex. Since such a reflex is not instantaneous, it is easy to accommodate other stimuli and the chances of forming a conditioned reflex are high. If the stimulation of masturbation is improper, it can cause the reflex time to change, either becoming shorter to form premature ejaculation; or becoming longer to form non-ejaculation or difficult ejaculation. Masturbation leads to rapid ejaculation, many times, repeatedly, and the abnormal reflexes caused by masturbation are solidified, forming permanent premature ejaculation! The ejaculation stimulation, mainly not the penis skin stimulation, but the deep nerve stimulation inside the penis, to the hospital to take semen sperm retrieval device (or adult sex store sold jumping ball or shocker) is vibration to make people ejaculate rather than rubbing the penis skin to make people ejaculate, so the dorsal nerve of the penis only block the superficial nerve and the efficacy is not sure. No need to take medicine, medicine can not change the nerve reflex! It can be treated by electric reflexes of the penile nerves, choosing special stimulation frequencies to change the old ejaculatory reflexes, establish new ones and re-mediate the reflexes!