Our senses enable us to navigate and make sense of our environment, but more importantly, they enable us to find food and mates, and to avoid danger. Our sense of taste and smell help us to learn what’s poisonous and what’s edible. Our sense of touch tells us when our feet are touching the ground, and that fi re is hot. And as an added bonus, our senses allow us to hear and see beautiful things, to feel the softness of a kitten's fur or take pleasure in the touch of others and to enjoy what . . .