Alexander Pope provides the answer in his catechistic couplet. Be not the first on whom the new is tried Nor yet the last to lay the old aside. A matter of courtesy. Moving up the scale of importance we reach that level of human behavior which is judged on the basis of civility and manners. Unfortunately, this category can be as volatile as its predecessor.
Manners are more important than laws.
Upon them in great measure the laws depend. The law reaches us but here and there, and now and then. Manners are what vex or smooth, corrupt or purify, exalt or debase, barbarize or refine us by a constant, steady, uniform, insensible operation, like that of the air we breathe in. A matter of vulgarity. Our culture has suffered an insidious dumbing down of our sense of obscenity.