Well there's actually some degree of truth to the Carmex addiction rumor... One of the main ingredients is alum, which is a drying agent (ask any chemist). The reason it's there? Look on the jar... Carmex is for COLD SORES... For the uninitiated, cold sores are simply herpes simplex A's way of expressing itself. Herpes is a virus, so once you've got it, you've got it for life (same goes for simplex B, the genital variety). The sores are really gross (quite glad I'm not speaking from experience) and you're supposed to put Carmex on them so that they dry up. The sooner they dry up and scab over, the sooner they're gone.
So if you use Carmex on your lips, they are going to dry out... the other ingredients lubricate, however, so you won't know until the lubrication has worn off. Who knows to what degree the alum in Carmex actually makes a difference, but it is there.
However, there's no "addictive" chemical in any lip balm. I use a neutrogina lip moisturizer... pretty nice stuff! Gotta love the norwegians!
Take that, snopes.
l2c