The actual fact is that you can find a number of factors that can cause fast ejaculation, such as mental tension, which can cause the nerves in the glans area to be more sensitive, thus triggering the patient to ejaculate too quickly; male circumcision or circumcision can also increase glans sensitivity and trigger fast ejaculation because the glans is usually subjected to too little external stimulation. In addition, certain factors in life, such as not having sex for a long time and wearing tight underwear, can also cause glans sensitivity.