The wings bend anyway. Watch 'em next time you fly. The fuselage also twists and bends. This is why, in a long airliner, curtains are put in at intervals. This

The wings bend anyway. Watch 'em next time you fly. The fuselage also twists and bends. This is why, in a long airliner, curtains are put in at intervals. This is because the twisting and bending is visible to the passengers in the back, and it unnerves them.