When you see somebody yawning does it ever happen that you yawn back? Your answer would probably be ”Off course, all the time”. It’s a scientific fact that yawning is ”contagious”. None the less in some situations it’s courteous to restrain yourself from yawning or you just have to pay attention not to get photographed while uttering a yawn. These people were caught red-handed, enjoy while staring at their gaping jaws.
