Men who feel pain for the first time can be caused by inexperience in sex, circumcision and inflammation of the glans. 1. Inexperienced in sex: It may be due to inexperienced in sex that can’t fully arouse women’s lust, resulting in vaginal dryness and pain caused by excessive friction during sexual intercourse. 2. Hypercircumcision: It may also be because the patient has a long foreskin or phimosis, which makes the glans too sensitive, thus causing pain. 3. Inflammation of the glans: In addition, it is also possible that the patient suffers from inflammation of the glans, and so on, in the process of sexual life stimulates the inflammation of the area, thus triggering the pain. To summarize, under normal circumstances, men do not feel pain during sex, if the patient has obvious or persistent pain symptoms, they should go to the hospital in time, to clarify the cause of the disease, for treatment.