Today, as I was doing my make-up, I needed a Q-tip to fix a mistake. I took one out the box and put it in my mouth to get it wet. Too bad someone had used it before to clean their ears. FML
Saliva can provide better uses that water at times, also it's your own body of you think your saliva is gross you should probably clean your mouth. Saliva is good for getting makeup off in all honesty. And sometimes the faucet can be too harsh and drench the q tip.
My lipstick comes off better from licking my lips than from rubbing with a water-wet (probably a better term but I just woke up and can't word right now) paper towel so I can see why op would use saliva.
"Water-wet paper towel" made me think of someone stuffing a paper towel in their mouth to get it wet because for some reason they didn't want to use the faucet.