yawning is not healthy

serious, when you see someone yawn, it just means that the person's body is releasing carbon dioxide. out bodies have a self-protecting mechanisms which will trigger off yawns to rid us of excess amounts of carbon dioxide. excess amounts of it will make us unconscious that is why we feel sleepy whenever we yawn, not the other way around. it is not that we are tired or bored, we just have too much carbon dioxide within. so the next time you are talking to somebody or giving a presentation and somebody yawns, do not be upset. it is just the body mechanism has kicking in.