Write the next sentence in the following story.

How to protect against an std
Consider abstinence.
The most surefire way of preventing an std is to not engage in sexual behaviors. These behaviors include oral sex, vaginal sex, and anal sex.
Abstinence is a good choice for some people but is not realistic or desirable for many people, however. If abstinence is not an option, there are many ways to reduce your risk of infection.