Saliva might not be the grossest human fluid, but it is still pretty foul.

You don't always want to swap spit For that reason, particularly when it is left behind in a soda can.

I prefer kissing.

One particularly undesirable brand of spit is known as "backwash". Backwash is the term for fluid which makes its way from ones mouth back into a beverage container.

Backwash seems inevitable. There are some people who believe that the final 10% of liquid in a soda can is entirely backwash.

ert