WHY is yawning contagious?

Numerous studies have been done on this issue by experts, who have come to the conclusion that sympathy is the most typical reaction to yawning.

It turns out that yawning is contagious for psychological reasons. A person who is more prone to forming bonds with people is more likely to be caught yawning. Otherwise, a person yawns more frequently "for the ride" the more friendly they are.

📌 By the way, the most common cause of jaw dislocation is uncontrollable yawning.