Yawning is a natural phenomenon that can be observed in humans and animals. We assume that boredom and tiredness triggers yawning. To understand the causes of yawning you will have to delve a little deeper. Even the baby in womb is noted to be yawning. Nobody can escape yawning. It is also amusing how people start yawning when they see someone else yawning nearby. Yawning feels quite pleasant as it feels our chest with fresh air. People tend to yawn by opening their mouth and drawing in as much air as they can. We do not learn to yawn. It is an involuntary reaction that we know inherently.
