There is no 100% protection against Sexually Transmitted Diseases. (BTW. There is no 100% contraception either.) The only way to achieve 100% protection is not to have sex at all or have sex with the faithful healthy partner.
Saying that there are things that work well – condoms. Always use condoms for ANY kind of sex.
Always keep good hygiene! Wash your hands and private bits thoroughly with soap and pee after sex. That will not provide 100% protection, but it helps.
To sum up:
- Use latex condoms every time you have sex. If you use a lubricant, make sure it’s water-based. Use condoms for the entire sex act. Condoms are not 100% effective at preventing disease or pregnancy. However, they are extremely effective if used properly. Learn how to use condoms correctly.
- Avoid sharing towels or underclothing.
- Wash before and after intercourse.
- Get a vaccination for hepatitis B. This is a series of three shots.
- Get tested for HIV.
- If you have a problem with drug or alcohol abuse, get help. People who are drunk or on drugs often fail to have safe sex.
- Consider that not having sex is the only sure way to prevent STDs.