Why is licking your lips bad?

Evaporation. You wet your lips, humidity is probably low, so the heat and the lack of moisture in the air carry of your saliva and more moisture, which comes right out of your lips. Which you lick, because they're dry, which repeats the process, making them dryer.

Explanation:

So it just makes your lips more dryer than before.

Answer

As the saliva make your slips dry

Explanation:

obviously, the latter.

i-i-i-i-i-i don't k-k-k-k-know.