Taste, gustatory perception, or gustation the one sense that makes life worth living. Could you imagine if you could not taste food? 
Oh you are so right!  Taste is by far a wonderful sense to have!  
That reaction that happens in the mouth chemically makes me happy daily. The taste of morning coffee, o' my god. 
I like that bitter taste as well.  What allows us to taste?
Taste
Taste, gustatory perception, or gustation (Adjectival form: gustatory) is one of the five traditional senses that belongs to the gustatory system.
Taste is the sensation produced when a substance in the mouth reacts chemically with taste receptor cells located on taste buds in the oral cavity, mostly on the tongue. Taste, along with smell (olfaction) and trigeminal nerve stimulation (registering texture, pain, and temperature), determines flavors of food and/or other substances. Humans have taste receptors on taste buds (gustatory
frequencies that can be heard are detected this way. Some deaf people are able to determine the direction and location of vibrations picked up through the feet.
Five "traditional" senses Taste.
Taste or gustation (adjectival form: gustatory) is one of the traditional five senses. It refers to the capability to detect the taste of substances such as food, certain minerals, and poisons, etc. The sense of taste is often confused with the "sense" of flavor, which is a combination of taste and smell