We can head off dating-related problems long before our kids are thinking about the subject. Bring them up knowing what God's word says. Help them to learn about God's views on purity, kindness, honor and obedience. As the issue of dating comes up, help them relate this knowledge to this new area. If you and your teen are not finding agreement on the subject, obey God's mandate not to cause frustration in your child.
Frustration often comes from inconsistency.
Avoid this by knowing you opinion and sticking firmly to it rather than waffling back and forth, lest your child not know how you truly feel. Avoid frustration by refusing to argue. As the parent, it is your job to set the rules. If your teen does not like them, acknowledge their displeasure, but do not enter into an all out battle over it. Nothing good can come of that.