The Chemistry Of A Kiss

Revealed:

A passionate kiss causes our blood vessels to dilate as the brain receives more oxygen than normal. Our cheeks flush, our pulse quickens, and breathing becomes irregular and deepens. Our pupils dilate, which may be the reason so many of us close our eyes. We also activate five of our twelve cranial nerves that spread out intricately to different parts of the face. The nerve pathways guide the way we interpret the world by helping us see, smell, hear, taste, and touch. On top of that, our lips are associated with a disproportionately large part of the brain.