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.

"When forced to leave my house for an extended period of time, I take my typewriter with me, and together we endure the wretchedness of passing through the X-ray scanner. The laptops roll merrily down the belt, while I'm instructed to stand aside and open my bag. To me it seems like a normal enough thing to be carrying, but the typewriter's declining popularity arouses suspicion and I wind up eliciting the sort of reaction one might expect when traveling with a cannon.