A kiss is divine. A kiss is energy exchange between human and god. Between two human beings or two animals, a kiss is like soul eating. It is like partaking each other s nature. The physical stimulus and thrill are actually aimed at uniting souls rather than just bodies. The lips are considered as the symbol of portal between inner and outer life. This can be felt by those persons who are spiritually evolved. It is said that animals do not have many layers of lies and deceit, so they are in better position to feel this divine and immortal energy.