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In humans, smell is often viewed as an aesthetic sense, as a sense capable of eliciting enduring thoughts and memories. Smell, however, is the primal sense. It is the sense that affords most organisms the ability to detect food, predators, and mates.

Smells are so powerful and evocative, sometimes stronger than visual cues.

The sense of smell explores; deleterious substances almost always have an unpleasant smell.

Smell is incredibly important and sensual; it communicates who you are.

Smell is stimulating. It stirs things up and makes us nostalgic - a wonderful word which literally means 'ache for home' - which serves to inspire new circuits in the brain.

Smell is a very animal thing, almost reptilian, where the more cerebral things like reading less so.

Smell was our first sense. It is even possible that being able to smell was the stimulus that took a primitive fish and turned a small lump of olfactory tissue on its nerve cord into a brain. We think because we smelled.

If you're walking down the street and you smell a scent, it can take you right back to a memorable time in your life, whether it's a moment with an ex-girlfriend or a childhood event.

The sense of smell, like a faithful counsellor, foretells its character.