Junk is a cellular equation that teaches the user facts of general validity. I have learned a great deal from using junk: I have seen life measured out in eyedroppers of morphine solution. I experienced the agonizing deprivation of junk sickness, and the pleasure of relief when junk-thirsty cells drank from the needle. Perhaps all pleasure is relief. I have learned the cellular stoicism that junk teaches the user. I have seen a cell full of sick junkies silent and immobile in separate misery.