How much Spit do you produce every day?

Why does your mouth make Saliva? What is your Spit made of? Does your Spit actually make food taste better? Thank you for being a subscriber! Please leave a great review right here in the app, and you might hear it on an upcoming episode!  Get official Who Smarted? Merch: tee-shirts, mugs, hoodies and more at www.WhoSmarted.com