In the western countries this thing does not matter and teenagers go on a first date without knowing by their families. But in the Philippines if they still had their grandparents around who grew up in the old fashioned way of dating and courting then this teenagers should need first the approval of their elders to go on for their first date. But like what you had said that we are now in the modern age and the thinking of our youth as well of their parents had advanced also with the trend of the modern society I think that they are allowed already to go on with their first date even they are not introducing the guy first to their family.