The other three senses.

This is a brief explanation about how the senses of touching, tasting and smelling help us in our daily life for communication. The original source is:
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Taste

We can communicate by receiving messages through taste. Babies make good use of communicating with their world by tasting things around them.

Taste lets you enjoy the flavour of your favourite foods. You can tell if food has gone off because it tastes unpleasant. Taste also tells you if something is dangerous or poisonous, although you should never taste anything if you think that it might be unsafe. If you look carefully at your tongue you will see tiny little bumps all over it - these are called taste buds. There are four different types of taste buds on your tongue. At the front of your tongue you can taste sweet, on both sides of the tongue you taste sour, at the back you taste bitter, and all over your tongue you taste salty.

Touch

We communicate with touch by feeling things. People hug to show that they are happy to see each other, shake hands to show that they agree, or put their arms around a person who is upset.

We feel messages that are communicated to us by touch through touch receptors. These are located in groups around the skin and look a bit like tiny onions. When they are squeezed, the layers rub against each other and send electrical signals to the brain. Some touch receptors are more sensitive than others. Sensitive touch receptors can be found on different parts of your body, including your face and your fingers.

Smell

We send and receive messages through smell. We can smell dangerous things like smoke from a fire or poisonous gas. We can also smell pleasant things like flowers or a freshly baked cake. Smell communicates powerful messages to our noses.

When we breathe, air goes into the nose through the nostrils. The air then travels down the back of the mouth and into the throat. Any smell, or odour, that passes through the nasal cavity is stuck to the mucus in your nose. The tiny hairs in your nose, called sensory hairs, sense the odour and send messages to your brain where the smell is identified. The smell receptor cell, which responds to the chemicals in the mucus in your nose, is positioned high up behind the nose.