Usuario:NataliaPfl

Because the nose is so close to (and, hence, well connected with) the brain, the sense of smell is the primary driver of disgust. The chemical compounds given off by things that can cause disease or infection often have a very distinctive smell, which the human brain recognizes instantly. When it does so, it switches to survival mode right away, and literally forces your body to isolate itself from the source of possible infection. It does that by making you recoil (which moves you away), scrunching up your nose (which constricts your nasal passages, and stops you breathing in any more noxious smells), and by making you gag (which stops you swallowing anything through your mouth).
Yellow or grey teeth are definitely huge negatives on a person's personality. Many people discolor their teeth to a large extent by the time they reach thirty and some of these people choose to live with it rather than looking for an easy cure. There are a number of teeth whitening systems available in the markets these days. From herbal derivatives to chemical-rich toothpastes, you can find all sorts of remedies today. Teeth whitening kids can be easily found in the markets and you can use the various teeth whitening gels available in the market to get rid of discoloration on the teeth.

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