Just because you didn't ejaculate during ovulation doesn't mean you won't get pregnant. Even during the safe period, sperm may flow out of the male reproductive organs and enter the female reproductive organs, causing pregnancy. Therefore, whenever you have sex, if the man does not ejaculate inside, it can lead to pregnancy.

If you don't want to get pregnant, men should take steps to make sure sex is safe. These measures include:

1. Use condoms: Condoms are a widely used form of birth control that reduce the risk of sperm entering the female reproductive organs.

2. In vitro ejaculation: In vitro ejaculation is an unsafe form of sexual intercourse because sperm may escape from the male reproductive organ and can enter the female reproductive organ.

3. Avoid prolonged sex: Prolonged sex may increase sperm count and increase the risk of pregnancy.

4. Avoid having sex after drinking: Having sex after drinking may increase the risk of pregnancy, because alcohol affects the secretion of hormones and affects reproductive function.

If men don't want to get pregnant, they should take steps to make sure sex is safe. If you have any questions or concerns, it is recommended to consult a doctor or professional advisor.