Final answer:
Planning ahead is the approach that will reduce a person's likelihood of engaging in risky sex. It allows for preparedness and informed decision-making, crucial for STI prevention. Knowledge of STIs is also important, but actionable planning is necessary to significantly reduce risks.
Step-by-step explanation:
Among the options provided, planning ahead is the approach that will reduce a person's likelihood of engaging in risky sex. By planning ahead, individuals can ensure that they are prepared to practice safe sex behaviors such as proper condom use and can avoid situations that may lead to unanticipated sexual encounters or the pressure to engage in sexual activity without precautions. An informed decision-making process and preparedness are key components to effective STI prevention.
Consuming alcohol and having a crush do not necessarily promote safe sex practices and can in fact impair judgment and lead to increased risk-taking behaviors. The knowledge about STIs is crucial, but without actionable planning and behavioral modifications, it alone may not be sufficient to reduce the likelihood of engaging in risky sex.
To further prevent the spread of STIs, it is recommended to avoid risky behaviors such as contact with another person's blood or body fluids, sharing needles, and to consider abstinence from sexual activity. It is also important to correct misconceptions about STI transmission, such as the false belief that you can't get STIs if you are sexually active with just one person, or if you don't have symptoms then you don't have an STI.