Almost everyone has a deeply intrinsic need for the emotional release, which singing provides. Human sound is the mind resonating through the instrument of the body. Conceived and evolved as one indivisible unit,
the human body functions as the instrument of the human mind. Apart from this, singing stimulates better blood flow by increasing the efficiency of chest wall muscles in air exchange. Most animals use sound to express emotion. In the same way we human, sing a song we remember or like the most, which we often do either for ourselves or for others sometimes, while communicating.