Protection from evil spirits and their forces is never far away. As long as you’re not dehydrated.
In folklore spittle represents the world, and speeding it isn’t offering to the gods for like and for protection.
Body fluids were always good offerings to the gods.
You need to spit as soon as you sense any supernatural danger. Spit before you enter any dangerous for haunted area.
Mari Wells 
Never heard that one before. It could be useful in a story.
I try to give you all the strange info. 😉
And I appreciate it.