Why are condoms not 100% effective?

While condoms are highly effective in preventing pregnancy and sexually transmitted infections (STIs), they are not 100% effective. There are several reasons for this:

1. Human error: Condoms can be used incorrectly, which can reduce their effectiveness. For example, condoms may not be put on correctly, or they may slip off during intercourse.

2. Condom failure: Condoms can sometimes break or tear during intercourse, which can lead to pregnancy or STI transmission.

3. Incorrect storage: Condoms that are not stored properly may be less effective. For example, condoms that are exposed to heat or moisture may deteriorate and become more likely to break.

4. STI transmission through other means: Some STIs, such as human papillomavirus (HPV), can be transmitted through skin-to-skin contact, even if a condom is used.

Despite these factors, condoms are still one of the most effective methods of contraception and STI prevention. By using condoms correctly and consistently, you can significantly reduce your risk of pregnancy and STIs.

Here are some tips for using condoms effectively:

* Choose the right condom. Condoms come in different sizes, so it is important to choose one that fits snugly but is not too tight.

* Put on the condom correctly. Follow the instructions on the condom package for how to put on a condom correctly.

* Check the condom for damage. Before using a condom, check it for any tears or holes. If you find any damage, do not use the condom.

* Use a condom every time you have sex. This is the only way to be sure that you are protected from pregnancy and STIs.