There is no specific limit to how old a man can be without sex. Generally to 65 ~ 75 years old no sex life, physical condition as well as sex demand is different, sex life stop time will have some difference, the specific situation needs to be different from person to person, can not be generalized. Under normal circumstances, men in 40 years of age after the frequency of sex will gradually decline, and as age increases, the frequency of sex will be less and less, generally in the 65 ~ 75 years of age to stop sex. But there are some particularly healthy as well as high libido demand for men, sexual life time may last until about 80 years old, so that the specific situation needs to be different from person to person. Men with age testicular tissue although there is some atrophy, but will also produce a small amount of androgen, there will also be sperm, have a normal sex life may also lead to female pregnancy.