картинку в тему вчера кинули наглядную: http://img1.joyreactor.cc/pics/post/%D0%A1%D0%BE%D1%87%D0%B8-2014-%D0%9E%D0%BB%D0%B8%D0%BC%D0%BF%D0%B8%D0%B0%D0%B4%D0%B0-%D0%A1%D0%BE%D1%87%D0%B8-2014-1057401.jpeg