Smell united the scattered cells that inhabited our watery beginnings. As multiple-cell creatures evolved to inhabit the dark oceans of the world sight and speech had not yet been developed. Our early ancestors depended solely on the ability to detect chemicals through our first and only existing sense – smell. The nervous system organized as we evolved to develop a smell brain, the prime functions of which was to increase individual fitness, find food, detect the presence of enemies and to identify mates. Other systems evolved over the millennium, but smell in its primitive form was retained. Our sense of smell utilizes the same region of the brain as it did from the beginning, which is why smell is often referred to as our most primitive sense. Over time it expanded it’s functions connecting our sense of smell to our emotions, sexuality, creativity and memory.