Focus on the family teenage dating
Pros: The Bible says Christians should be yoked to fellow believers.
If a teen is dating another Christian, there is a greater likelihood that they will remain abstinent and supportive of one another.
Cons: Not all teens mature at the same rate, so even though your teen comes to that age, he or she may still not be able to handle it.
The Solution: Try using that age as a "review" age.
Many parents set rules for their Christian teens about dating.
While setting rules is a good idea, it is important for parents to think through the rules that they do set.
The Solution: Spend some time discussing sex with your teen so that he or she understands why God wants teens to wait until marriage.
Having a clear understanding of why they should wait can help teens make better decisions.
Your direct statement will be in the back of their head, even if they seem to scoff at your statement.
While all of these rules are appropriate, it will be easier for your teen to follow your rules if they understand where the rules come from.
Don't just cite Scripture -- explain how it applies.
The Solution: Encourage your teen to call you if the other couple leaves or does anything that compromises your teen's situation.
Also, try to meet the other couples so that you can feel more comfortable about your teen associating with him or her.