Windowpane

I know a boy from across the the street Handsome as can be But when the sun sets He trades in his mile for a frown every night I see him sitting at his window staring into the sky , Tears silently roll down his cheeks He looks troubled , Disturbed and upset How can such an angelic face be filled with so much pain? Every night he sits there , Staring into the sky , Seeking comfort from an invisible source , And that's when it got me thinking... Is that why its called a windowpane? Because so many individuals so often sit there and express their pain?