Smell

Though we believe that we are reasonable animals, in many ways we are similar with the wild animals.

Take our brain as an example, in the previous entry I have mentioned the strong relationship between the limbic system with the taste and smell functions. In fact, Limbic system is considered to be functionally elementary: it is responsible for the regulation of the emotion and thus direct the fight or flight response when we are endangered. Therefore, the outcome would be either to be, or not to be. (Many people considered it to be the most difficult question in lives though.)

It is more notable when we compare the limbic system with the neocortex, that is the most outlying part of the brain. It interpret the messages from the sensory organs and produce response to the motor organs, being the central commander of our daily livings. The input is not just about the fear, but consisting of precise muscle tension and possibly metabolic concentration, etc. The output are even more complex: it was not only about what you will do next (to run or jump), but also how fast you run and how high you jump.

Go back to the right track. The perceptions undoubtedly affect our emotion. But what kind of perceptions change the most? It is perhaps the smell. The odor of a person will perhaps be more distinguishable and memorable. For example, we come across with a person on the street closely, you can hardly pay more attention to the face (because you still have the watch out the road condition), but on the other hand, the odor of the person stimulates you the most.

To sum up, buy a good perfume is better than doing some useless make-up with make you look awkward.