Yawn

'Yawning' intrigues me so much suddenly that i've just done reading dozens of articles about yawn.

Yawning is associated with tiredness, stress, overwork, lack of stimulation, but not boredom. So don't be mad at your boyfriend/girlfriend the next time they yawn on a date with you, because yawning is an involuntary action(means nobody can help it), and they're not actually bored talking to you. In fact, everyone's been yawning since they're 11weeks old, yes, when you're still a bloody foetus.

What's a shocking truth for me is that animals yawn too. Dogs, cats, snakes, even hippos. But not necessarily caused by sleep deprivations, they can yawn for some funny reasons. For example, dogs often yawn after seeing people yawn, and when they are confused. They probably got 'yawning' from us, and we got 'doggiestyle' from them in turn. = =

Every yawn is contagious. When you start to yawn, you'll probably notice that people around you yawn too, and yeah dogs included. One can even start to yawn just thinking about it. But studies show that contagious yawning can be explained by empathy. We yawn when we see people yawn because we're trying to show that we understand their yawn, and we want to show them we can yawn too. So a contagious yawn is actually kind of a socially driven action.

...*yawn~