I said that passion and sensuality are integral part of art. It is not just curiosity for form that an artist studies nudes, and draws them, paints them. It is for the sensual experience. Also, even while drawing a curve, what is taking a satisfying form, the breath of an artist begins to come and go with force, with passion. We experience the pleasure which he would if he met the same form in real life. This happens also when composing poetry, and I should think while dancing or singing or playing on any instrument in the same manner pain is who felt when dealing with a painful theme or situation in artistic creation.