This category of lyrics recognizes and acknowledges that men are far from perfect and have many areas in which they can improve upon.
It is fairly evident by anyone who has been around children that they are very adept at picking up and memorizing messages in music. Feel free to consult with parents, guardians, school teachers, pediatricians, and child psychologists for their opinions and experiences.
Besides being a source of joy, children are our future investment. Education is a major component in protecting our investment. In the computer industry, they call it "Garbage In, Garbage Out." That is, the product that one gets out of the system is only as good as the data put in. Is our society any different? If children are bombarded with pictures and words that glorify irresponsible sex, drug abuse, gratuitous violence, etc., then what outcome can we expect?
The values that children learn as they develop become the most important attributes they possess in life because they define the social and subculture boundaries and influence the choices made in life. Unfortunately, the words "values and morals" has been overused by certain groups on one side, while ridiculed and trivialized by other groups on the other side, all in the attempt to implement their extreme agendas.
Regardless, values and morals are the basic building blocks to any civilization and cannot be ignored or disavowed. It is morals and values that ultimately become the power to prevent lying to your loved ones, stealing from your friend, abusing a child, raping a women, pulling the trigger, etc., etc. Without values and morals such as honesty, fairness, responsibility, trust, kindness, generosity, equality, and justice we are no better than animals, regardless of how sophisticated our technology advances make us appear. In fact we are less than animals, because animals do not have a choice.
Many people despise absolute political correctness because it can be suffocating and restricting and make people overly cautious, rigid, and stiff. But somewhere in the "gray" there is a line that we should not cross. In addition, regardless of what may be acceptable for adults, we need to do a much better job in keeping inappropriate material out of ears and eyes of children.
What, if any, should be the criteria for exposing inappropriate material to others: in our own privacy; in the company of friends; in front of our families; in front of children; in the work place; and in the public space?