The general attitude on MN is a bit of dirt never hurt anyone, don't be too precious, a bit of someone else's snot and a few germs never killed anyone good for the immue system etc etc.
But then it seems everyone hates people who lick their fingers to turn pages or open a carrier bag! How can this be??? Surely it;s a miniscule amount of someone else's saliva - you probably get more on your hand by shaking hands with them!