First, mild premature ejaculation:
1. The time after the penis is inserted into the vagina is more than six minutes. Ejaculate in less than fifteen minutes.
2. In the course of sex with a partner, 6 times out of 10 times of sex are unable to cooperate with the partner to control ejaculation.
Second, moderate premature ejaculation:
1. The time after the penis is inserted into the vagina is more than two minutes. Ejaculate in less than six minutes.
2. In the course of sex with a partner, 8 times out of 10 times of sex cannot cooperate with the partner to control ejaculation.
Three. Severe premature ejaculation:
1. The penis ejaculate without being inserted into the vagina or as soon as it is inserted into the vagina.
2. The ejaculation takes less than two minutes after the penis is inserted into the vagina.
3. In the course of sex with a partner, there are 10 times out of 10 times in which the partner cannot control the ejaculation.