Despite the sheer lack of proof, it's become pretty well accepted that yawning is associated with boredom.
For some unexplainable reason, it's near impossible to swallow back the annoyance of being yawned at mid-conversation (or mid-something-worse)...
But HowStuffWorks has released a bunch of new theories behind the strange facial phenomenon, and they might make you question whether or not yawning is actually all that rude.
For starters, there's the 'Physiological Theory', which draws from the belief our bodies are absorbing as much oxygen as possible while removing the build-up of carbon dioxide. Although an international neuroscientist went and called bullocks on that idea, insisting more or less oxygen wouldn't actually change chips.
We then move on to the 'Evolution Theory', arguing yawning originates from our ancestors who used the action to intimidate their enemies by baring their teeth. But others debate only early man developed the habit as a subtle signal to switch activities.
Third on the list – the 'Brain-Cooling Theory', proposing people yawn more frequently when their brains are warmer. Scientists have reportedly discovered cooler brains think more clearly (pun not intended), so perhaps it is possible yawning occurs when the body is trying to keep the brain all cool, active and alert.
Last but not least, the 'Boredom Theory', a totally unproven, totally unscientifically viable, totally random hypothesis drawn from who knows what conclusions. Then again, would these photos be nearly as entertaining if we assumed the celebrities were 'cooling their brains down'? Personally, we'd rather have a laugh over the fact that all of them may well be bored out of their brains instead.
Did we make you yawn? #SorryNotSorry.
