Yawning is a common phenomenon that occurs in humans and animals, but the reasons behind it are still not fully understood. Yawning is a reflexive action that involves taking a deep breath, opening the mouth wide, and exhaling. It is often associated with tiredness, boredom, or relaxation, but it can also serve other purposes, such as increasing alertness, regulating body temperature, or expressing emotions.   One of the most intriguing aspects of yawning is that it can be contagious. That is, seeing someone else yawn can trigger you to yawn as well. Contagious yawning has been observed in humans and some other mammals, such as chimpanzees,…