I Know Why

And the craving crept in.
The void that's been here days and for nights,
You sit exhausted when artificial lights only accent your face.
It's dull.
The mind floats, aimless. 
Ruffle a few papers on your desk.
You pick up the coffee mug , mindless,
And it touches your lips. 
For all sanity, You should've known.
The ceramic burns against your skin , your eyes widen at the instant.
I know you're surprised. 
I know why.