Bruxism is a disorder characterized by grinding and clenching of the teeth, companied with fasciculation of masticatory muscles in nonfunctional status.
There was once a time when every gym had an army of energy-bar-munching zombies, convinced that they would get six-pack abs, tighter buns, and sweeter pecs if they just supplemented their routine with a PowerBar.
Evolutionary psychologists have argued that what we know today as KISSING may have come from kiss-feeding, the exchange of pre-chewed food from one mouth to another.Mother birds are famous for doing this.