>>17681
The reason for spiting in the first place is to get rid of phlegm, this is made of bacteria, enzymes, salts ect. Things that your body is trying to expel for a reason so you don’t get sick and disrupt your Microbiome.
>like trillions of humans have done for millenia?
There’s only been like 102Billion across human history but what ever, and for most of that millenia we didn’t have good understandings of bacteria or cell theory.
It is objectively bad for you to keep it in, remove it by spitting it out of your system, preferably in a place that the Pathogens won’t be near you, like out side the car.