The parent could share some dating experiences and give some real life scenarios about dos and donts when going on dates. If the parent isn't sure where to start, they can discuss a movie they have recently seen about dating and relationships. The can even surf the net together to look at top dating sites.
Teaching our children about the dating and relationships is integral because there will come a time when the child will decide by himself or herself who they want to be with. As parents, we can only support their decisions and stand by them when the time comes. I believe it is better to be proactive than be reactive.