Yawning may be misunderstood. You're not bored, you're cooling your brain.
These results clearly suggest that yawning regulates the temperature inside your head, and that perhaps we yawn to cool our brains. What we don't have here is any biochemical cause-and-effect, but this is an incredibly interesting theory all the same.
The findings, if valid, draw a few unexpected conclusions about yawning. First of all, rather than stimulating sleep, a good yawn should fend off falling asleep. And secondly, far from being an indicator of boredom, yawning would appear to be a mechanism for maintaining attention.
So be sure and remember this for your next staff meeting -- it's an excellent excuse, and possibly even a valid one! [More]
Right - and dozing off is a way of concentrating your thoughts.
[via Daily Dish]