At 19, there's a much higher percentage of people who just don't know what a real, healthy relationship looks like and can only go by whatever examples they have in their lives and whatever their favored media is selling to them. Aside from the exhaustion, I can't imagine dating anyone under 25 because I can't believe that they would be dating me as a person. It seems like standard procedure that everyone has to go around and collect some relationship 'war stories' before they're ready to settle down and date for real.