by that logic, you might as well fart in your face too because you're breathing that air
That is by far the most flawed theory I have ever read
One problem with that, you would need to eat about 5 pounds of beans, to produce enough farts, to dry your hands.
Not to mention, you'd probably have to drop a log, right about the time you dried your hands, the first time.....Catch 22.
i hated washing my face in the sink after i flushed the toilet