Could it be, that some were raised in homes without full service parents, and there fore didn't learn the basis of relating with respect?
Just look at how dancing has gone from facing each other belly to belly in sync in step and rhytm to helter skelter to the point you don't know who is dancing with whom. Not unusal to see a full drink or lite cigarette in hand, as well.
Not much relating or respect. And that is not saying anything about the decline in music, except for the increased volume till it moves you!