Why do people chew the top of their pencil/pen? Why did people lick pencil tips before using them/writing? Why do we mostly use blue inked pens to write when black ink serves a better contrast to white paper?.
Why do some people lick the tip of a pencil before trying to write with it similarly why did most elderly women lick their eyebrow pencil before.
"Is there something about saliva that makes graphite flow better?" For the answer, which was "yes," the Globe turned to Dr. Jack B. Howard.