"Disgusting creatures" To an addict, their next fix FEELS like food to a starving person - I've read that the part of our brains that deals with basic survival needs also encourages them to be highly motivated to find their next fix. (Otherwise, people could just kick addictions with ease.) So to an addict, doing that is no more disgusting than a starving person eating spilled food off the floor. A sense of perspective and understanding when dealing with addiction & substance abuse is essential IMO, otherwise you never get past first base trying to help anyone break free from it.