Human sexual behavior is an extremely complex physiological and psychological process, the duration of sexual intercourse, the individual differences between different couples is very great, only a very small number of people can maintain more than half an hour in a sexual intercourse. The key is the two sides of the sexual feelings, as long as both sides can get sexually excited satisfaction and pleasure, that is the perfect sex life. No sexologist has ever specified how long intercourse should last. According to the survey, the average duration of sexual intercourse for men is 2 to 3 minutes. However, it cannot be assumed that less than this time is premature ejaculation. Because every couple has different habits in their sex life, they have different duration of intercourse at different ages. Newlywed couples and couples who have had their first sexual intercourse for the first time will ejaculate prematurely, which is considered a normal physiological phenomenon and cannot be considered premature ejaculation. In terms of time, ejaculation after 2 minutes of penile insertion into the vagina is normal. Therefore, some sexologists to sexual intercourse time is normal or not under two standards: one is from the medical point of view, can maintain more than 2 minutes or more than 16 times of pumping are normal. Another criterion is to compare yourself with yourself, for example, he used to be able to last half an hour, suddenly dropped to 5 minutes, that is not normal. (Article from Family Doctor Online)