Are you yawning?!
Question:
Are you yawning?
what is a yawn? why do they happen? what do they do? are they really contagious? i heard that even if you read about yawning that youll yawn. lol i actually yawned twice just writing this.
Answers:
A yawn occurs because the body never really get rid of all of the Carbon Dioxide when you exhale. Therefore, a yawn is a deep contraction of the diaphragm to squeeze the lungs as much as possible. Yawns are not contagious in the usual sense, it is however an on sight "response", in that, you yawn when you see another person yawn.