After circumcision, the sensitivity of the glans may decrease. This is due to the loss of foreskin coverage of the glans and glans coronalis after circumcision. In daily activities, then the friction with the underwear gradually leads to localized thickening of the glans cuticle, potentially reducing the surface sensitivity. So clinically a part of premature ejaculation patients, if there is a long foreskin, can first be circumcised. After the completion of surgery, dynamic observation of the glans coronal groove or glans local sensitivity is reduced. For non-organic premature ejaculation, after circumcision, the local sensitivity will be reduced to different degrees. But if there are organic lesions, then even if the circumcision surgery, can not reduce the local sensitivity. For example, patients with primary premature ejaculation, there is a local nerve threshold is too low, not simply the foreskin covering the glans or the glans coronal structure, resulting in increased local sensitivity, so for patients with primary premature ejaculation, after circumcision, can not improve its sensitivity.