User blog comment:Lenopow/Portal 2 Easter Egg - Creepy Message/@comment-66.68.35.67-20131219005548

I originally thought that Doug's hideouts, loosely refered to as "rat holes" or "rat dens" were created by someone close to Chell, considering the drawings of her that are shown in many of his areas. Turns out i was wrong, not suprisingly; Douglas monitered Chell herself for an extensive amount of time before the neurotoxin incident. Why exactly, I'm not sure. But I guess he got bored during his long time desperately trying to escape the surveilance of GLaDOS. So he starting drawing pictures of a random female test subjects... and collecting radios... and multicolored coffee cups... yah, he's insane.