The cervix cannot be inserted. The body of the uterus and the cervix are closely connected, if the male penis is too long, it is possible to top the mouth of the cervix during sex, but it can not be inserted into the uterus, because the cervical opening is usually in a closed state under normal circumstances, and the cervical opening will be opened only when giving birth to a child. Top to the mouth of the uterine cavity during sex, may lead to female abdominal discomfort or pain, and frequent contact with the cervix, in fact, will have a certain impact on women’s health, is likely to cause cervical damage, triggering cervical inflammation, so try not to insert so deep during sex.