from a medical blog i came across while looking for photos of people using chapstick (whatever):
MedHelp Member's Question
Is chapstick really addictive?
I know this sounds rediculous, but I was wondering if chapstick is addictive. I have been using chapstick daily, multiple times a day for the past 5 years. When I dont use it, my lips become unbearably chapped.
by Alan Rockoff, MD
Chapstick isn't addictive, but putting any moisturizer on lips tends to be habit-forming.
Lips are very psychologically-sensitive areas. Just thinking about them makes them feel dry. Whenever a patient complains of dry lips, I have to force myself not to lick them while they're talking.