Many a time, the environment with which the human lives is not favorable to him, so he devises a means to make sure that such an environment meets the comfort of his body and soul, so he devised a means that is he creates materials, equipment, tools and so much more to make sure he is comfortable. Humans don't joke with comfort, because it is in that state that the human race is more productive when there is pressure here and there and the man is not living in a favorable weather condition and environment, he will be frustrated, depressed,...