Did you know that hydrogen sulfide, molecule for molecule, is as lethal as cyanide? The only difference is, one of them’s in your farts (at far too low of a concentration to harm you, except psychologically).
Did you ever wonder if you could eat (or do drugs) with your butt?
Did you ever wonder what cat food tastes like? And why that should matter to humans? And why dogs (and rats, and others) eat their own poop?
And have you ever thought, really THOUGHT, about your own saliva?
I bet you’re thinking about it now.
It’s weird, isn’t it.
But no saliva, no rectal storage, and no potentially lethal levels of hydrogen sulfide will stop the intrepid Mary Roach, as she embarks upon her latest book, Gulp: Adventures on the Alimentary Canal.