When drinking alcohol, people are more likely to make risky sexual decisions. It is important that teenagers are aware of what consenting to sex means. They need to be aware that consent needs to be provided verbally, without pressure or persuasion, that a person can change their mind at any time, and if they change their mind, then sexual activity must stop. It is also important to highlight that intoxicated people are legally unable to consent and a person could face serious consequences for having sex with someone who is intoxicated. Further information about consenting to sex can be found here. You could also discuss the potential consequences of having unprotected sex (e.g., Sexually Transmitted Infections (STIs) and/or unwanted pregnancy), and brainstorm strategies with your teenager to reduce the chances of this occurring.