ALWAYS PRACTICE SAFER SEX.
The most reliable way to avoid STIs and pregnancy is abstinence. However, if you have sex, be safe!
One way of practicing safe sex is using a male condom.
For information on other forms of contraceptive, click here. Some methods DON'T WORK - learn more here.
No matter what form of birth control you use, always use either a male or female condom to protect against STIs.